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 Lead-acid battery: electrochemical device that stores electric power in a chemical from through lead electrodes and sulfuric acid electrolyte
Amper (Amp): electric unit of measurement
Self-discharge: discharge that takes place when the battery is in open circuit
Terminal: part of the electrode that connects with the external circuit
Capacity: electric charge, expressed in amper-hours (Ah), that can be extracted from a battery under a pre-determined discharge regime, under specific conditions of voltage, temperature and electrolyte density. It is defined with the letter “C” followed by numeric suffix that indicates the number of discharge hours at the specified regime
Reserve Capacity (min): indicates the amount of time that a 12 volt battery can deliver 25 amperes at 80 °F (27 °C) and maintain an terminal voltage greater than or equal to 10.5 volts
Nominal Capacity: is the capacity guaranteed by the manufacturer under specific conditions of voltage, temperature, time and electrolyte density.
Charge: process through which electric direct current (DC) is supplied to a battery, causing chemical reactions that increase the energy stored in the battery. The amount of charge delivered is measured by the integration of current and time, and it is measured in Ah
Cell: basic unit of a battery, composed of a positive and a negative electrode, separators and diluted sulfuric acid electrolyte, and stored inside a case or container
Cycles: quantity of charge - discharge phases supported by a battery under specific conditions disclosed by the manufacturer
Discharge: chemical reaction through which the battery generates electric direct current (DC), which reduces the energy potential of the battery
Electrode: plate or group of plates of the same polarity that are integrated physically and electrically to one another
Electrolyte: acid solution that acts as the electrical conductive substance
Battery cycle life: number of charge - discharge cycles in which a battery can perform properly under conditions of temperature, voltage, depth of discharges and maintenance specified by the manufacturer
Plate: combination of grid and active material
Cranking Amps: amount of amperes a battery can deliver at 0°C (32°F) for at least 30 seconds during the engine start and maintain at least 1.2 volts per cell
Battery Life: estimated time the battery can provide energy to the engine start
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