Alpha Technologies Lomain Ni-Cd Pocket Plate Battery - Manual (Page 20)

745-680-B10-001 Rev. A 20
4.0 Operating Features, continued
4.8 Cycling
The Alpha Lomain Ni-Cd battery is designed to perform a significant number of charge-
discharge cycles in stationary standby operations.
The determining factor for the number of charge-discharge cycles the battery is able to
provide is the depth of discharge.
A battery that is less deeply discharged will provide more charge-discharge cycles until it
reaches the point at which it can no longer provide the minimum design limit.
Conversely, a battery that has been more deeply discharged will have a shorter charge-
discharge cycle life.
The graph below illustrates typical values for the effect of depth of discharge on the available
charge-discharge cycle life.
Fig. 13, Cycle life vs. depth of discharge as a percentage of rated capacity (20°C)