Power factor (l) - Ratio between the active power P supplied to a load and the apparent power S supplied to said load by an AC power supply.
Noise level - Acoustical decibel level of a source of noise, measured according to the applicable ISO standard.
Pulse Current - A periodic current drain of higher than normal drain rates.
Wall-less Design - A battery design where the structural support for the cells is formed by an open plastic framework.
Internal Impedance - The opposition exhibited by a circuit element (cell or battery) to the flow of an alternating current (a.c.) of a particular frequency as a result of resistance, induction and capacitance.
Safety installation - Installation supplying electrical equipment which may have a direct effect on the safety of users and must therefore remain energized even in the event of a mains failure. In general, characteristics concerning the power supply and conditions for transfer to the safety source for such electrical equipment are covered by applicable regulations.
Current Drain - The current withdrawn from a battery during discharge.