Nickel-cadmium battery discharge mode

The discharge characteristics of the nickel-cadmium battery under the constant-power mode, at several different power levels, are shown in Fig. 28.18. These are similar to the data presented in Fig. 28.7 for constant-current discharges, except that the performance is presented in hours of service instead of percent discharge capacity. The power levels are shown based on the -rate. The -rate is calculated in a manner similar to calculating the C-rate, but based on the rated watthour capacity. For example, for the E/5 power level, the power for a battery rated at 780 mWh is 156 mW. 

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