25.3 Batteries

Background

The first battery

The leclanché cell

Carbon-zinc dry cell

Alkaline cell

Lithium cell

Secondary cells

The lead-acid cell

The lead-acid cell (2)

Plates in a lead-acid cell

Gel battery

Typical gel battery

Nickel-cadmium cell

Nicad battery bank

Nickel-iron (nife) cell

Nickel metal-hydride (ni-mh)

Ni-mh examples

Lithium-ion cell

Ampere-hour rating of a battery

Output voltage

Internal resistance

Calculating internal resistance

Connecting cells – in series

Connecting cells – in parallel

Connecting cells – in series-parallel

Testing cells

Measuring charge: lead-acid battery

Charging batteries

Charging nicads

Charging lead-acid batteries

Safety with batteries