Frequency - The repetition of cycles measured in Hz. 60 Hz is the standard frequency in the U.S. 50 Hz is the standard frequency in other parts of the world. 60 Hz = 60 cycles per second.
Gassing - The evolution of gas from one or more of the electrodes in a cell. Gassing commonly results from local action (self-discharge) or from the electrolysis of water in the electrolyte during charging.
Power Surge - Voltage above 110% of rated RMS voltage for one or more cycles.
Reversal - The changing of the normal polarity of a battery due to overdischarge.
E-Rate - Discharge or charge power, in watts, expressed as a multiple of the rated capacity of a cell or battery which is expressed in watt-hours. For example, the E/10 rate for a cell or battery rated at 17.3 watt-hours is 1.73 watts. (This is similar to the method for calculating C-Rate.)
Circuit breaker (battery) - DC circuit breaker that protects the battery of a UPS.(back)
Output (rated) - Apparent power Pn that the UPS can deliver under given load conditions (power factor = 0.8).
