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A rechargeable lithium polymer Nokia

mobile phone battery

Energizer AA size

2500 mAh (1.2 V, 3.0 Wh,NiMH) rechargeable cell

A battery bank used for an

uninterruptible power supply in a data

center

Rechargeable batteryFrom Wikipedia, the free encyclopedia

A rechargeable battery, storage battery, oraccumulator is a type of electrical battery. It

comprises one or more electrochemical cells, and is a type of energy accumulator. It is known

as a secondary cell because its electrochemical reactions are electrically reversible.

Rechargeable batteries come in many different shapes and sizes, ranging from button cells to

megawatt systems connected to stabilize an electrical distribution network. Several different

combinations of chemicals are commonly used, including: leadacid, nickel cadmium (NiCd),nickel metal hydride (NiMH), lithium ion (Li-ion), and lithium ion polymer (Li-ion polymer).

Rechargeable batteries have lower total cost of use and environmental impact than disposable

batteries. Some rechargeable battery types are available in the same sizes as disposable types.

Rechargeable batteries have higher initial cost but can be recharged very cheaply and used

many times.

Contents

1 Usage and applications

2 Charging and discharging

2.1 Damage from cell reversal

2.2 Damage during storage in fully discharged state

2.3 Depth of discharge

3 Active components

4 Table of rechargeable battery types

4.1 Common rechargeable battery types

4.2 Less common types

5 Developments since 2005

6 Alternatives

7 See also

8 References9 Further reading

10 External links

Usage and applications

Rechargeable batteries are used for automobile starters, portable consumer devices, light

vehicles (such as motorized wheelchairs, golf carts, electric bicycles, and electric forklifts),

tools, and uninterruptible power supplies. Emerging applications in hybrid electric vehicles and

electric vehicles are driving the technology to reduce cost and weight and increase lifetime.[1]

Traditional rechargeable batteries have to be charged before their first use; newer low self-

discharge NiMH batteries hold their charge for many months, and are typically charged at the

factory to about 70% of their rated capacity before shipping.

Grid energy storage applications use rechargeable batteries for load leveling, where they store

electric energy for use during peak load periods, and for renewable energy uses, such as

storing power generated from photovoltaic arrays during the day to be used at night. By charging batteries during periods of low

demand and returning energy to the grid during periods of high electrical demand, load-leveling helps eliminate the need for expensive

peaking power plants and helps amortize the cost of generators over more hours of operation.

The US National Electrical Manufacturers Association has estimated that U.S. demand for rechargeable batteries is growing twice as

fast as demand for nonrechargeables.[2]

Charging and discharging

Further information: Battery charger
http://en.wikipedia.org/wiki/National_Electrical_Manufacturers_Associationhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-2http://en.wikipedia.org/wiki/National_Electrical_Manufacturers_Associationhttp://en.wikipedia.org/wiki/Photovoltaic_arrayhttp://en.wikipedia.org/wiki/Grid_energy_storagehttp://en.wikipedia.org/wiki/Uninterruptible_power_supplyhttp://en.wikipedia.org/wiki/Low_self-discharge_NiMH_batteryhttp://en.wikipedia.org/wiki/File:Datacenter_Backup_Batteries.jpghttp://en.wikipedia.org/wiki/Battery_electric_vehiclehttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-1http://en.wikipedia.org/wiki/File:Datacenter_Backup_Batteries.jpghttp://en.wikipedia.org/wiki/Uninterruptible_power_supplyhttp://en.wikipedia.org/wiki/Hybrid_electric_vehiclehttp://en.wikipedia.org/wiki/File:Datacenter_Backup_Batteries.jpghttp://en.wikipedia.org/wiki/Rechargeable_battery#See_alsohttp://en.wikipedia.org/wiki/Rechargeable_battery#Alternativeshttp://en.wikipedia.org/wiki/Rechargeable_battery#Less_common_typeshttp://en.wikipedia.org/wiki/Rechargeable_battery#Common_rechargeable_battery_typeshttp://en.wikipedia.org/wiki/Rechargeable_battery#Active_componentshttp://en.wikipedia.org/wiki/Rechargeable_battery#Depth_of_dischargehttp://en.wikipedia.org/wiki/Rechargeable_battery#Damage_from_cell_reversalhttp://en.wikipedia.org/wiki/Rechargeable_battery#Charging_and_discharginghttp://en.wikipedia.org/wiki/Nickel%E2%80%93metal_hydride_batteryhttp://en.wikipedia.org/wiki/Electrochemical_cellhttp://en.wikipedia.org/wiki/Battery_chargerhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-2http://en.wikipedia.org/wiki/National_Electrical_Manufacturers_Associationhttp://en.wikipedia.org/wiki/Amortization_(business)http://en.wikipedia.org/wiki/Peaking_power_planthttp://en.wikipedia.org/wiki/Photovoltaic_arrayhttp://en.wikipedia.org/wiki/Renewable_energyhttp://en.wikipedia.org/wiki/Grid_energy_storagehttp://en.wikipedia.org/wiki/Low_self-discharge_NiMH_batteryhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-1http://en.wikipedia.org/wiki/Battery_electric_vehiclehttp://en.wikipedia.org/wiki/Hybrid_electric_vehiclehttp://en.wikipedia.org/wiki/Uninterruptible_power_supplyhttp://en.wikipedia.org/wiki/Forkliftshttp://en.wikipedia.org/wiki/Electric_bicycleshttp://en.wikipedia.org/wiki/Golf_cartshttp://en.wikipedia.org/wiki/Wheelchair#Electric-powered_wheelchairshttp://en.wikipedia.org/wiki/Car_batteryhttp://en.wikipedia.org/wiki/Rechargeable_battery#External_linkshttp://en.wikipedia.org/wiki/Rechargeable_battery#Further_readinghttp://en.wikipedia.org/wiki/Rechargeable_battery#Referenceshttp://en.wikipedia.org/wiki/Rechargeable_battery#See_alsohttp://en.wikipedia.org/wiki/Rechargeable_battery#Alternativeshttp://en.wikipedia.org/wiki/Rechargeable_battery#Developments_since_2005http://en.wikipedia.org/wiki/Rechargeable_battery#Less_common_typeshttp://en.wikipedia.org/wiki/Rechargeable_battery#Common_rechargeable_battery_typeshttp://en.wikipedia.org/wiki/Rechargeable_battery#Table_of_rechargeable_battery_typeshttp://en.wikipedia.org/wiki/Rechargeable_battery#Active_componentshttp://en.wikipedia.org/wiki/Rechargeable_battery#Depth_of_dischargehttp://en.wikipedia.org/wiki/Rechargeable_battery#Damage_during_storage_in_fully_discharged_statehttp://en.wikipedia.org/wiki/Rechargeable_battery#Damage_from_cell_reversalhttp://en.wikipedia.org/wiki/Rechargeable_battery#Charging_and_discharginghttp://en.wikipedia.org/wiki/Rechargeable_battery#Usage_and_applicationshttp://en.wikipedia.org/wiki/List_of_battery_sizeshttp://en.wikipedia.org/wiki/Lithium_ion_polymer_batteryhttp://en.wikipedia.org/wiki/Lithium_ion_batteryhttp://en.wikipedia.org/wiki/Nickel%E2%80%93metal_hydride_batteryhttp://en.wikipedia.org/wiki/Nickel%E2%80%93cadmium_batteryhttp://en.wikipedia.org/wiki/Lead%E2%80%93acid_batteryhttp://en.wikipedia.org/wiki/Grid_energy_storagehttp://en.wikipedia.org/wiki/Button_cell#Rechargeable_variantshttp://en.wikipedia.org/wiki/Chemical_reactionhttp://en.wikipedia.org/wiki/Electrochemistryhttp://en.wikipedia.org/wiki/Accumulator_(energy)http://en.wikipedia.org/wiki/Electrochemical_cellhttp://en.wikipedia.org/wiki/Electrical_batteryhttp://en.wikipedia.org/wiki/Uninterruptible_power_supplyhttp://en.wikipedia.org/wiki/File:Datacenter_Backup_Batteries.jpghttp://en.wikipedia.org/wiki/Nickel_metal_hydridehttp://en.wikipedia.org/wiki/File:Energizer_reghargeble_batteryIMG_0006.JPGhttp://en.wikipedia.org/wiki/Mobile_phonehttp://en.wikipedia.org/wiki/Nokiahttp://en.wikipedia.org/wiki/File:Nokia_Battery_Hologram.jpg


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Diagram of the charging of a secondary

cell battery.

Battery charger

A solar-powered charger for

rechargeable AA batteries

During charging, the positive active material is oxidized, producing electrons, and the negative material is reduced, consuming electrons.

These electrons constitute the current flow in the external circuit. The electrolyte may serve as a simple buffer for internal ion flow

between the electrodes, as in lithium-ion and nickel-cadmium cells, or it may be an active participant in the electrochemical reaction, as

in leadacid cells.

The energy used to charge rechargeable batteries usually comes from a battery charger

using AC mains electricity, although some are equipped to use a vehicle's 12-volt DC

power outlet. Regardless, to store energy in a secondary cell, it has to be connected to a

DC voltage source. The negative terminal of the cell has to be connected to the negative

terminal of the voltage source and the positive terminal of the voltage source with thepositive terminal of the battery. Further, the voltage output of the source must be higher than

that of the battery, but not much higher: the greater the difference between the power

source and the battery's voltage capacity, the faster the charging process, but also the

greater the risk of overcharging and damaging the battery.

Chargers take from a few minutes to several hours to charge a battery. Slow "dumb"

chargers without voltage- or temperature-sensing capabilities will charge at a low rate,

typically taking 14 hours or more to reach a full charge. Rapid chargers can typically charge

cells in two to five hours, depending on the model, with the fastest taking as little as fifteen

minutes. Fast chargers must have multiple ways of detecting when a cell reaches full charge

(change in terminal voltage, temperature, etc.) to stop charging before harmful overcharging or

overheating occurs. The fastest chargers often incorporate cooling fans to keep the cells fromoverheating.

Battery charging and discharging rates are often discussed by referencing a "C" rate of

current. The C rate is that which would theoretically fully charge or discharge the battery in

one hour. For example, trickle charging might be performed at C/20 (or a "20 hour" rate),

while typical charging and discharging may occur at C/2 (two hours for full capacity). The

available capacity of electrochemical cells varies depending on the discharge rate. Some

energy is lost in the internal resistance of cell components (plates, electrolyte,

interconnections), and the rate of discharge is limited by the speed at which chemicals in the

cell can move about. For lead-acid cells, the relationship between time and discharge rate is

described by Peukert's law; a lead-acid cell that can no longer sustain a usable terminal

voltage at a high current may still have usable capacity, if discharged at a much lower rate.Data sheets for rechargeable cells often list the discharge capacity on 8-hour or 20-hour or

other stated time; cells for uninterruptible power supply systems may be rated at 15 minute

discharge.

Flow batteries, used for specialised applications, are recharged by replacing the electrolyte

liquid.

Battery manufacturers' technical notes often refer to VPC; this is volts per cell, and refers to

the individual secondary cells that make up the battery. (This is typically in reference to 12-

volt lead-acid batteries.) For example, to charge a 12 V battery (containing 6 cells of 2 V

each) at 2.3 VPC requires a voltage of 13.8 V across the battery's terminals.

Non-rechargeable alkaline and zinccarbon cells output 1.5V when new, but this voltage

drops with use. Most NiMH AA and AAA cells are rated at 1.2 V, but have a flatter

discharge curve than alkalines and can usually be used in equipment designed to use alkaline

batteries.

Damage from cell reversal

Subjecting a discharged cell to a current in the direction which tends to discharge it further, rather than charge it, is called reverse

charging. Generally, pushing current through a discharged cell in this way causes undesirable and irreversible chemical reactions to

occur, resulting in permanent damage to the cell. Reverse charging can occur under a number of circumstances, the two most common

being:

When a battery or cell is connected to a charging circuit the wrong way around.

When a battery made of several cells connected in series is deeply discharged.
http://en.wikipedia.org/wiki/Electrochemical_cellhttp://en.wikipedia.org/wiki/Volthttp://en.wikipedia.org/wiki/Flow_batteryhttp://en.wikipedia.org/wiki/Uninterruptible_power_supplyhttp://en.wikipedia.org/wiki/Peukert%27s_lawhttp://en.wikipedia.org/wiki/Trickle_charginghttp://en.wikipedia.org/wiki/Mains_electricityhttp://en.wikipedia.org/wiki/Battery_chargerhttp://en.wikipedia.org/wiki/Lead%E2%80%93acid_batteryhttp://en.wikipedia.org/wiki/Electrochemicalhttp://en.wikipedia.org/wiki/Nickel-cadmium_batteryhttp://en.wikipedia.org/wiki/Lithium-ion_batteryhttp://en.wikipedia.org/wiki/Electrodehttp://en.wikipedia.org/wiki/Ionhttp://en.wikipedia.org/wiki/Electrolytehttp://en.wikipedia.org/wiki/Electrical_networkhttp://en.wikipedia.org/wiki/Electric_currenthttp://en.wikipedia.org/wiki/Redoxhttp://en.wikipedia.org/wiki/Electronhttp://en.wikipedia.org/wiki/Oxidizedhttp://en.wikipedia.org/wiki/File:Solar_AA_charger_01_Pengo.jpghttp://en.wikipedia.org/wiki/File:Charger.jpghttp://en.wikipedia.org/wiki/File:Secondary_Cell_Diagram.svg


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In the latter case, the problem occurs due to the different cells in a battery having slightly different capacities. When one cell reaches

discharge level ahead of the rest, the remaining cells will force the current through the discharged cell. This is known as "cell reversal".

Many battery-operated devices have a low-voltage cutoff that prevents deep discharges from occurring that might cause cell reversal.

Cell reversal can occur to a weakly charged cell even before it is fully discharged. If the battery drain current is high enough, the cell's

internal resistance can create a resistive voltage drop that is greater than the cell's forward emf. This results in the reversal of the cell's

polarity while the current is flowing.[3][4] The higher the required discharge rate of a battery, the better matched the cells should be, both

in kind of cell and state of charge, in order to reduce the chances of cell reversal.

In some situations (such as when correcting Ni-Cad batteries that have been previously overcharged[5]

), it may be desirable to fullydischarge a battery. To avoid damage from the cell reversal effect, it is necessary to access each cell separately: each cell is individually

discharged by connecting a load clip across the terminals of each cell, thereby avoiding cell reversal.

Damage during storage in fully discharged state

If a multi-cell battery is fully discharged, it will often be damaged due to the cell reversal effect mentioned above. It is possible however

to fully discharge a battery without causing cell reversal--either by discharging each cell separately, or by allowing each cell's internal

leakage to dissipate its charge over time.

Even if a cell is brought to a fully discharged state without reversal, however, damage may occur over time simply due to remaining in the

discharged state. An example of this is the sulfation that occurs in lead-acid batteries that are left sitting on a shelf for long periods. For

this reason it is often recommended to charge a battery that is intended to remain in storage, and to maintain its charge level byperiodically recharging it. Since damage may also occur if the battery is overcharged, the optimal level of charge during storage is

typically around 30% to 70%.

Depth of discharge

Main article: Depth of discharge

Depth of discharge (DOD) is normally stated as a percentage of the nominal ampere-hour capacity; 0% DOD means no discharge.

Seeing as the usable capacity of a battery system depends on the rate of discharge and the allowable voltage at the end of discharge, the

depth of discharge must be qualified to show the way it is to be measured. Due to variations during manufacture and aging, the DOD for

complete discharge can change over time or number of charge cycles. Generally a rechargeable battery system will tolerate more

charge/discharge cycles if the DOD is lower on each cycle.[6]

Active components

The active components in a secondary cell are the chemicals that make up the positive and negative active materials, and the electrolyte.

The positive and negative are made up of different materials, with the positive exhibiting a reduction potential and the negative having an

oxidation potential. The sum of these potentials is the standard cell potential or voltage.

In primary cells the positive and negative electrodes are known as the cathode and anode, respectively. Although this convention is

sometimes carried through to rechargeable systems especially with lithium-ion cells, because of their origins in primary lithium cells

this practice can lead to confusion. In rechargeable cells the positive electrode is the cathode on discharge and the anode on charge, and

vice versa for the negative electrode.

Table of rechargeable battery types
http://en.wikipedia.org/wiki/Lithium-ion_batteryhttp://en.wikipedia.org/wiki/Anodehttp://en.wikipedia.org/wiki/Cathodehttp://en.wikipedia.org/wiki/Primary_cellhttp://en.wikipedia.org/wiki/Voltagehttp://en.wikipedia.org/wiki/Oxidationhttp://en.wikipedia.org/wiki/Redoxhttp://en.wikipedia.org/wiki/Electrolytehttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-6http://en.wikipedia.org/wiki/Charge_cyclehttp://en.wikipedia.org/wiki/Depth_of_dischargehttp://en.wikipedia.org/wiki/Lead%E2%80%93acid_battery#Sulfation_and_desulfationhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-5http://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-4http://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-3http://en.wikipedia.org/wiki/Electromotive_force


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TypeVoltagea Energy densityb Powerc E/$e Disch.f Cyclesg Lifeh

(V) (MJ/kg) (Wh/kg) (Wh/L) (W/kg) (Wh/$) (%/month) (#) (years)

Leadacid 2.10.11-

0.1430-40 60-75 180 5-8 3%-4% 500-800

5-8 (automotive

battery), 20

(stationary)

Alkaline 1.5 0.31 85 250 50 7.7


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Graph of mass and volume energy densities of several secondary

cells

a Nominal cell voltage in V.

b Energy density = energy/weight or energy/size, given in

three different unitsc Specific power = power/weight in W/kge Energy/consumer price in Wh/US$ (approximately)fSelf-discharge rate in %/monthg Cycle durability in number of cycles

h Time durability in yearsi VRLA or recombinant includes gel batteries and

absorbed glass matsp Pilot productionrDepending upon charge rate

Common rechargeable battery types

Nickelcadmium battery (NiCd)

Created by Waldemar Jungner of Sweden in 1899, it used nickel oxide hydroxide and metallic cadmium as electrodes. Cadmium is a

toxic element, and was banned for most uses by the European Union in 2004. Nickelcadmium batteries have been almost completelysuperseded by nickelmetal hydride (NiMH) batteries.

Nickelmetal hydride battery (NiMH)

First commercial types were available in 1989.[25] These are now a common consumer and industrial type. The battery has a hydrogen-

absorbing alloy for the negative electrode instead of cadmium.

Lithium-ion battery

The technology behind the lithium-ion battery has not yet fully reached maturity. However, the batteries are the type of choice in many

consumer electronics and have one of the best energy-to-mass ratios and a very slow loss of charge when not in use.

Lithium-ion polymer battery

These batteries are light in weight and can be made in any shape desired.

Less common types

Lithium sulfur battery

A new battery chemistry developed by Sion Power since 1994.[26] Claims superior energy to weight than current lithium

technologies on the market. Also lower material cost may help this product reach the mass market. [27]

Thin film battery (TFB)

An emerging refinement of the lithium ion technology by Excellatron.[28] The developers claim a very large increase in recharge

cycles, around 40,000 cycles. Higher charge and discharge rates. At least 5Ccharge rate. Sustained 60Cdischarge, and 1000Cpeak discharge rate. And also a significant increase in specific energy, and energy density.[29]

Also Infinite Power Solutions makes thin film batteries (TFB) for micro-electronic applications, that are flexible, rechargeable,

solid-state lithium batteries.[30]

Smart battery

A smart battery has the voltage monitoring circuit built inside. See also: Smart Battery System

Carbon foam-based lead acid battery

Firefly Energy has developed a carbon foam-based lead acid battery with a reported energy density of 30-40% more than their

original 38 Wh/kg,[31] with long life and very high power density.

Potassium-ion battery

This type of rechargeable battery can deliver the best known cycleability, in order of a million cycles, due to the extraordinary

electrochemical stability of potassium insertion/extraction materials such as Prussian blue.Sodium-ion battery

This type is meant for stationary storage and competes with leadacid batteries. It aims at a very low total cost ownership per

kWh of storage. This is achieved by a long and stable lifetime. The number of cycles is above 5000 and the battery does not get

damage by deep discharge. The energy density is rather low, somewhat lower than leadacid. [citation needed]
http://en.wikipedia.org/wiki/Wikipedia:Citation_neededhttp://en.wikipedia.org/wiki/Sodium-ion_batteryhttp://en.wikipedia.org/wiki/Prussian_bluehttp://en.wikipedia.org/wiki/Potassium-ion_batteryhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-31http://en.wikipedia.org/wiki/Smart_Battery_Systemhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-30http://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-29http://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-28http://en.wikipedia.org/wiki/Thin_film_rechargeable_lithium_batteryhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-27http://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-26http://en.wikipedia.org/wiki/Lithium_sulfur_batteryhttp://en.wikipedia.org/wiki/Lithium-ion_polymer_batteryhttp://en.wikipedia.org/wiki/Loss_of_chargehttp://en.wikipedia.org/wiki/Energy_densityhttp://en.wikipedia.org/wiki/Lithium-ion_batteryhttp://en.wikipedia.org/wiki/Cadmiumhttp://en.wikipedia.org/wiki/Electrodehttp://en.wikipedia.org/wiki/Alloyhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-25http://en.wikipedia.org/wiki/Nickel%E2%80%93metal_hydride_batteryhttp://en.wikipedia.org/wiki/Electrodehttp://en.wikipedia.org/wiki/Cadmiumhttp://en.wikipedia.org/wiki/Nickel_oxide_hydroxidehttp://en.wikipedia.org/wiki/Waldemar_Jungnerhttp://en.wikipedia.org/wiki/Nickel%E2%80%93cadmium_batteryhttp://en.wikipedia.org/wiki/Absorbed_glass_mathttp://en.wikipedia.org/wiki/Gel_batteryhttp://en.wikipedia.org/wiki/VRLAhttp://en.wikipedia.org/wiki/US$http://en.wikipedia.org/wiki/Watt_hourhttp://en.wikipedia.org/wiki/Power-to-weight_ratiohttp://en.wikipedia.org/wiki/Energy_densityhttp://en.wikipedia.org/wiki/Voltagehttp://en.wikipedia.org/wiki/Energy_densityhttp://en.wikipedia.org/wiki/File:Secondary_cell_energy_density.svg


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Developments since 2005

In 2007, Yi Cui and colleagues at Stanford University's Department of Materials Science and Engineering discovered that using silicon

nanowires as the anode of a lithium-ion battery increases the volumetric charge density of the anode by up to a factor of 10, leading to

the development of the nanowire battery.[32][33]

Another development is the paper-thin flexible self-rechargeable battery combining a thin-film organic solar cell with an extremely thin

and highly flexible lithium-polymer battery, which recharges itself when exposed to light.[34]

Ceramatec, a research and development subcompany of CoorsTek, as of 2009 was testing a battery comprising a chunk of solid

sodium metal mated to a sulfur compound by a paper-thin ceramic membrane which conducts ions back and forth to generate a current.

The company claimed that it could fit about 40 kilowatt hours of energy into a package about the size of a refrigerator, and operate

below 90 C; and that their battery would allow about 3,650 discharge/recharge cycles (or roughly 1 per day for one decade).[35]

Alternatives

Several alternatives to rechargeable batteries exist or are under development. For uses such as portable radios, rechargeable batteries

may be replaced by clockwork mechanisms which are wound up by hand, driving dynamos, although this system may be used to charge

a battery rather than to operate the radio directly. Flashlights may be driven by a dynamo directly. For transportation, uninterruptible

power supply systems and laboratories, flywheel energy storage systems store energy in a spinning rotor for conversion to electric

power when needed; such systems may be used to provide large pulses of power that would otherwise be objectionable on a commonelectrical grid. Ultracapacitors are also used; an electric screwdriver which charges in 90 seconds and will drive about half as many

screws as a device using a rechargeable battery was introduced in 2007,[36] and similar flashlights have been produced.

Ultracapacitorscapacitors of extremely high valueare being developed for transportation, using a large capacitor to store energy

instead of the rechargeable battery banks used in hybrid vehicles. One drawback to capacitors compared with batteries is that the

terminal voltage drops rapidly; a capacitor that has 25% of its initial energy left in it will have one-half of its initial voltage. Battery

systems tend to have a terminal voltage that does not decline rapidly until nearly exhausted. This characteristic complicates the design of

power electronics for use with ultracapacitors. However, there are potential benefits in cycle efficiency, lifetime, and weight compared

with rechargeable systems. China started using ultracapacitors on two commercial bus routes in 2006; one of them is route 11 in

Shanghai.[37]

See Battery (electricity) for comparisons between battery types.

See also

Battery pack

Battery recycling

Biobattery

Energy storage

List of energy storage projects

Mercury-Containing and Rechargeable Battery Management Act

Metalair electrochemical cellPower-to-weight ratio

Rechargeable energy storage system

Service life

Smart card

WiTricity

Comparison of battery types

References

1. ^ David Linden, Thomas B. Reddy (ed). Handbook Of Batteries 3rd Edition. McGraw-Hill, New York, 2002 ISBN 0-07-135978-8

chapter 22

2. ^ "Batteries Product Stewardship | Wastes | EPA" (http://www.epa.gov/epaoswer/non-hw/reduce/epr/products/batteries.htm). Epa.gov.

2006-06-28. Retrieved 2012-08-14.

3. ^ [1] (http://books.google.com/books?

id=wbzWOllJSewC&printsec=frontcover&dq=Solid+state+batteries+By+C.+A.+C.+Sequeira,+North+Atlantic+Treaty+Organization.+Sci
http://books.google.com/books?id=wbzWOllJSewC&printsec=frontcover&dq=Solid+state+batteries+By+C.+A.+C.+Sequeira,+North+Atlantic+Treaty+Organization.+Scientific+Affairs+Division&source=bl&ots=MBrPmXQOw2&sig=8zxsdC6UW0JJLbKuD8ccouk0sh8&hl=en&ei=BWDLTODcBMyWnweKvOjMDw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CBMQ6AEwAA#v=onepage&q&f=truehttp://books.google.com/books?id=wbzWOllJSewC&printsec=frontcover&dq=Solid+state+batteries+By+C.+A.+C.+Sequeira,+North+Atlantic+Treaty+Organization.+Scientific+Affairs+Division&source=bl&ots=MBrPmXQOw2&sig=8zxsdC6UW0JJLbKuD8ccouk0sh8&hl=en&ei=BWDLTODcBMyWnweKvOjMDw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CBMQ6AEwAA#v=onepage&q&f=truehttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-3http://www.epa.gov/epaoswer/non-hw/reduce/epr/products/batteries.htmhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-2http://en.wikipedia.org/wiki/Special:BookSources/0071359788http://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-1http://en.wikipedia.org/wiki/Comparison_of_battery_typeshttp://en.wikipedia.org/wiki/WiTricityhttp://en.wikipedia.org/wiki/Smart_cardhttp://en.wikipedia.org/wiki/Service_lifehttp://en.wikipedia.org/wiki/Rechargeable_energy_storage_systemhttp://en.wikipedia.org/wiki/Power-to-weight_ratiohttp://en.wikipedia.org/wiki/Metal%E2%80%93air_electrochemical_cellhttp://en.wikipedia.org/wiki/Mercury-Containing_and_Rechargeable_Battery_Management_Acthttp://en.wikipedia.org/wiki/List_of_energy_storage_projectshttp://en.wikipedia.org/wiki/Energy_storagehttp://en.wikipedia.org/wiki/Biobatteryhttp://en.wikipedia.org/wiki/Battery_recyclinghttp://en.wikipedia.org/wiki/Battery_packhttp://en.wikipedia.org/wiki/Battery_(electricity)http://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-37http://en.wikipedia.org/wiki/Shanghaihttp://en.wikipedia.org/wiki/Hybrid_vehicleshttp://en.wikipedia.org/wiki/Ultracapacitorhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-36http://en.wikipedia.org/wiki/Electric_screwdriverhttp://en.wikipedia.org/wiki/Flywheel_energy_storagehttp://en.wikipedia.org/wiki/Uninterruptible_power_supplyhttp://en.wikipedia.org/wiki/Flashlighthttp://en.wikipedia.org/wiki/Electrical_generatorhttp://en.wikipedia.org/wiki/Clockwork_radiohttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-35http://en.wikipedia.org/wiki/Ionshttp://en.wikipedia.org/wiki/CoorsTekhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-34http://en.wikipedia.org/wiki/Solar_cellhttp://en.wikipedia.org/wiki/Thin-filmhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-33http://en.wikipedia.org/wiki/Rechargeable_battery#cite_note-32http://en.wikipedia.org/wiki/Nanowire_batteryhttp://en.wikipedia.org/wiki/Nanowirehttp://en.wikipedia.org/wiki/Siliconhttp://en.wikipedia.org/wiki/Stanford_University


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entific+Affairs+Division&source=bl&ots=MBrPmXQOw2&sig=8zxsdC6UW0JJLbKuD8ccouk0sh8&hl=en&ei=BWDLTODcBMyWnwe

KvOjMDw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CBMQ6AEwAA#v=onepage&q&f=true) Solid state batteries By C. A.

C. Sequeira, North Atlantic Treaty Organization. Scientific Affairs Division, Pages 242-247, 254-259

4. ^ [2] (http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA149626) Computer simulations of short-down on

a variety of battery configurations

5. ^ http://www.repairfaq.org/ELE/F_NiCd_Memory.html

6. ^ Reddy, Handbook of Batteries page 22-20

7. ^ abc "mpoweruk.com: Accumulator and battery comparisons (pdf)" (http://www.mpoweruk.com/specifications/comparisons.pdf)

(PDF). Retrieved 2012-08-14.

8. ^ [3] (http://www.ornl.gov/ccsd_registrations/battery/presentations/Session4-350-Johnson.pdf)

9. ^ http://www.werbos.com/E/WhoKilledElecPJW.htm (which links to http://www.thunder-sky.com/home_en.asp)10. ^ Zero Emission Vehicles Australia (http://zeva.com.au/tech/LiFePO4.php)

11. ^ Lithium_Sulfur (http://www.polyplus.com/technology/lsulfur.htm)

12. ^ "Solar plane makes record flight" (http://news.bbc.co.uk/2/hi/science/nature/7577493.stm). BBC News. 24 August 2008. Retrieved 10

April 2010.

13. ^ [4] (http://www.polyplus.com/inproperty/patents/pat6358643.PDF)

14. ^ [5] (http://www.fraunhofer.de/en/press/research-news/2013/april/a-longer-life-for-lithium-sulfur-batteries.html)

15. ^ "Aquion energy" (http://www .aquionenergy.com/technology). Aquion energy. Retrieved 2012-08-14.

16. ^ ab "the Company" (http://www.excellatron.com/pilotline.htm). Excellatron. Retrieved 2012-08-14.

17. ^ "the Company" (http://www.excellatron.com/pilotline.htm). Excellatron. Retrieved 2012-08-14.



20. ^ "Vanadium Redox Battery" (http://www.vrb.unsw.edu.au/). Vrb.unsw.edu.au. Retrieved 2012-08-14.21. ^ ab broken link (http://www.cellstrom.at/fileadmin/docs/images/OPM/Cellstrom_FB10100_english.pdf)

22. ^ The Vanadium Advantage: Flow Batteries Put Wind Energy in the Bank (http://www.ehponline.org/members/2007/115-

7/innovations.html)

23. ^ "Sumitomo considering marketing new lower-temperature molten-salt electrolyte battery to automakers for EVs and hybrids"

(http://www.greencarcongress.com/2011/11/sumitomo-2011111.html). Green Car Congress. 2011-11-11. Retrieved 2012-04-24.

24. ^ "EVWORLD FEATURE: Fuel Cell Disruptor - Part 2:BROOKS FUEL CELL | CARB | ARB | HYDROGEN | ZEBRA | EV | ELECTRIC"

(http://www.evworld.com/article.cfm?storyid=465). Evworld.com. Retrieved 2012-08-14.

25. ^ Katerina E. Aifantis et al,High Energy Density Lithium Batteries: Materials, Engineering, Applications Wiley-VCH, 2010 ISBN 3-527-

32407-0 page 66

26. ^ "Sion Power Corporation - Advanced Energy Storage : Welcome" (http://www.sionpower.com). Sionpower.com. Retrieved 2012-08-

14.

27. ^ "Sion Power Corporation - Advanced Energy Storage : Technology Overview" (http://www.sionpower.com/technology.html).

Sionpower.com. Retrieved 2012-08-14.28. ^ "Excellatron" (http://www.excellatron.com). Excellatron. 2010-06-02. Retrieved 2012-08-14.

29. ^ "the Company" (http://www.excellatron.com/advantage.htm). Excellatron. Retrieved 2012-08-14.

30. ^ "The global leader in thin-film micro-energy storage devices" (http://www.infinitepowersolutions.com/). Infinite Power Solutions.

Retrieved 2012-04-24.

31. ^ "Firefly Energy Eyeing the Hybrid Market; Lead-Acid Foam Batteries for Mild-Hybrid Applications Heading to DOE for Testing and

Validation" (http://www.greencarcongress.com/2008/01/firefly-energy.html). Green Car Congress. 2008-01-12. Retrieved 2012-08-14.

32. ^ Serpo, Alex (15 January 2008). "A tenfold improvement in battery life?" (http://www .news.com/A-tenfold-improvement-in-battery-

life/2100-1041_3-6226196.html?part=rss&tag=2547-1_3-0-5&subj=news).News.com. CNET. Retrieved 2008-04-12.

33. ^ "High-performance lithium battery anodes using silicon nanowires"

(http://www.nature.com/nnano/journal/v3/n1/full/nnano.2007.411.html).Nanotechnology 3, 31 - 35 (2008) . Nature. 16 December 2007.

doi:10.1038/nnano.2007.411 (http://dx.doi.org/10.1038%2Fnnano.2007.411). Retrieved 2008-04-12.

34. ^ "Technology Review, Flexible Batteries That Never Need to Be Recharged, 2007"

(http://www.technologyreview.com/read_article.aspx?id=18482). Technologyreview.com. 2007-04-04. Retrieved 2012-08-14.35. ^ "New battery could change the world, one house at a time" (http://www.heraldextra.com/news/article_b0372fd8-3f3c-11de-ac77-

001cc4c002e0.html). Heraldextra.com. 2009-04-04. Retrieved 2012-08-14.

36. ^ "Capacitor-powered electric screwdriver, 2007" (http://www.ohgizmo.com/2007/10/01/coleman-flashcell-cordless-screwdriver-

recharges-in-just-90-seconds/). Ohgizmo.com. 2005-07-24. Retrieved 2012-08-14.

37. ^ [6] (http://web.archive.org/web/20070105022719/http://www.52bus.com/article/special/200608/special_6.html) (in Chinese, archived

page)

Further reading

Vlasic, Bill. Chinese Firm Wins Bid for Auto Battery Maker (http://www.nytimes.com/2012/12/10/business/global/auction-for-

a123-systems-won-by-wanxiang-group-of-china.html?), The New York Times, published online December 9, 2012, p. B1.Witkin, Jim. Building Better Batteries for Electric Cars (http://www.nytimes.com/2011/03/31/business/energy-

environment/31BATTERIES.html), The New York Times, March 31, 2011, p. F4. Published online March 30, 2011. Discusses

rechargeable batteries and the new-technology lithium ion battery.

Wald, Matthew L. Hold That Megawatt! (http://green.blogs.nytimes.com/2011/01/07/hold-that-megawatt/?), The New York

Times, January 7, 2011. Discusses AES Energy Storage.
http://books.google.com/books?id=wbzWOllJSewC&printsec=frontcover&dq=Solid+state+batteries+By+C.+A.+C.+Sequeira,+North+Atlantic+Treaty+Organization.+Scientific+Affairs+Division&source=bl&ots=MBrPmXQOw2&sig=8zxsdC6UW0JJLbKuD8ccouk0sh8&hl=en&ei=BWDLTODcBMyWnweKvOjMDw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CBMQ6AEwAA#v=onepage&q&f=truehttp://en.wikipedia.org/wiki/The_New_York_Timeshttp://green.blogs.nytimes.com/2011/01/07/hold-that-megawatt/?http://en.wikipedia.org/wiki/Lithium_ion_batteryhttp://en.wikipedia.org/wiki/The_New_York_Timeshttp://www.nytimes.com/2011/03/31/business/energy-environment/31BATTERIES.htmlhttp://en.wikipedia.org/wiki/The_New_York_Timeshttp://www.nytimes.com/2012/12/10/business/global/auction-for-a123-systems-won-by-wanxiang-group-of-china.html?http://web.archive.org/web/20070105022719/http://www.52bus.com/article/special/200608/special_6.htmlhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-37http://www.ohgizmo.com/2007/10/01/coleman-flashcell-cordless-screwdriver-recharges-in-just-90-seconds/http://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-36http://www.heraldextra.com/news/article_b0372fd8-3f3c-11de-ac77-001cc4c002e0.htmlhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-35http://www.technologyreview.com/read_article.aspx?id=18482http://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-34http://dx.doi.org/10.1038%2Fnnano.2007.411http://en.wikipedia.org/wiki/Digital_object_identifierhttp://www.nature.com/nnano/journal/v3/n1/full/nnano.2007.411.htmlhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-33http://www.news.com/A-tenfold-improvement-in-battery-life/2100-1041_3-6226196.html?part=rss&tag=2547-1_3-0-5&subj=newshttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-32http://www.greencarcongress.com/2008/01/firefly-energy.htmlhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-31http://www.infinitepowersolutions.com/http://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-30http://www.excellatron.com/advantage.htmhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-29http://www.excellatron.com/http://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-28http://www.sionpower.com/technology.htmlhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-27http://www.sionpower.com/http://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-26http://en.wikipedia.org/wiki/Special:BookSources/3527324070http://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-25http://www.evworld.com/article.cfm?storyid=465http://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-24http://www.greencarcongress.com/2011/11/sumitomo-2011111.htmlhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-23http://www.ehponline.org/members/2007/115-7/innovations.htmlhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-22http://www.cellstrom.at/fileadmin/docs/images/OPM/Cellstrom_FB10100_english.pdfhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-autogenerated1_21-1http://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-autogenerated1_21-0http://www.vrb.unsw.edu.au/http://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-20http://www.excellatron.com/pilotline.htmhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-:0_19-0http://www.excellatron.com/pilotline.htmhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-:1_18-0http://www.excellatron.com/pilotline.htmhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-:2_17-0http://www.excellatron.com/pilotline.htmhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-:3_16-1http://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-:3_16-0http://www.aquionenergy.com/technologyhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-sodiumion_15-0http://www.fraunhofer.de/en/press/research-news/2013/april/a-longer-life-for-lithium-sulfur-batteries.htmlhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-14http://www.polyplus.com/inproperty/patents/pat6358643.PDFhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-13http://news.bbc.co.uk/2/hi/science/nature/7577493.stmhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-12http://www.polyplus.com/technology/lsulfur.htmhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-11http://zeva.com.au/tech/LiFePO4.phphttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-10http://www.thunder-sky.com/home_en.asphttp://www.werbos.com/E/WhoKilledElecPJW.htmhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-9http://www.ornl.gov/ccsd_registrations/battery/presentations/Session4-350-Johnson.pdfhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-8http://www.mpoweruk.com/specifications/comparisons.pdfhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-batcomp_7-2http://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-batcomp_7-1http://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-batcomp_7-0http://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-6http://www.repairfaq.org/ELE/F_NiCd_Memory.htmlhttp://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-5http://oai.dtic.mil/oai/oai?verb=getRecord&metadataPrefix=html&identifier=ADA149626http://en.wikipedia.org/wiki/Rechargeable_battery#cite_ref-4http://books.google.com/books?id=wbzWOllJSewC&printsec=frontcover&dq=Solid+state+batteries+By+C.+A.+C.+Sequeira,+North+Atlantic+Treaty+Organization.+Scientific+Affairs+Division&source=bl&ots=MBrPmXQOw2&sig=8zxsdC6UW0JJLbKuD8ccouk0sh8&hl=en&ei=BWDLTODcBMyWnweKvOjMDw&sa=X&oi=book_result&ct=result&resnum=1&ved=0CBMQ6AEwAA#v=onepage&q&f=true


8/8


en.wikipedia.org/wiki/Rechargeable battery 8/8

Woody, Todd. Green Blog: When It Comes to Car Batteries, Moores Law Does Not Compute

(http://green.blogs.nytimes.com/2010/09/06/when-it-comes-to-car-batteries-moores-law-does-not-compute/), The New York

Times, September 6, 2010. Discusses lithium-air batteries.

External links

High-performance lithium battery anodes using silicon nanowires

(http://www.nature.com/nnano/journal/vaop/ncurrent/abs/nnano.2007.411.html)

Scientific American - How Rechargeable Batteries Work (http://www.sciam.com/article.cfm?id=how-do-rechargeable-that)

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