| A battery is an electrochemical device that converts chemicals energy into electrical energy during the discharge process. The amount of energy that can be stored in a battery is expressed through the battery’s capacity.
Capacity is the total Ampere hours available when the battery is discharged at a certain discharge current from a fully charged state to the end voltage. Capacity is calculated by multiplying the discharge current (in Amperes) by the discharge time (in hours) and decreases with increasing discharge current. Discharge current, as well as charging current, is usually expressed as a C-rate. A current required for a 1-hour discharge is described as 1C, a 2-hour discharge is C/2 or 0.5C and a 10-hour discharge as C/10 or 0.1C.
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