Closed-Circuit Voltage (CCV) - The potential or voltage of a battery when it is discharging or charging.
Polarization - The lowering of the potential of a cell or electrode from its equilibrium value caused by the passage of an electric current.
Tolerance in % - Limit for allowable variations for a given quantity, expressed as a percent of the rated value.
Internal Resistance (IR) - The opposition exhibited by a circuit element to the flow of direct current (d.c.). In a cell, the internal resistance is the sum of the ionic and electronic resistances of the cell components.
Bypass (automatic) - In the event of an overload or an unlikely UPS problem, your application is still powered, thanks to the automatic bypass module.
Current loop (20 mA) - Transmission system used on certain devices and offering better performance than the RS232C. It provides a high degree of immunity to interference and is easy to implement, but has not been standardized.
Service Life - The period of useful life of a battery before a predetermined end-point voltage is reached.