Cell - The basic electrochemical unit used to generate or store electrical energy.
Voltage Delay - Time delay for a battery to deliver the required operating voltage after it is placed under load.
Polarity - In electricity, the condition of being positive or negative.
Earthing system - System for the interconnection and earthing of exposed conductive parts and neutral. There are three types of neutral system - IT, TN, TT.
Nominal Voltage - The characteristic operating voltage or rated voltage of a battery.
Service Life - The period of useful life of a battery before a predetermined end-point voltage is reached.
Current Drain - The current withdrawn from a battery during discharge.