Changes

Decreased capacity, voltage, and life and increased IR losses and heating are seen with higher discharge current rates, along with a more rapid decrease in voltage during the discharge. If we discharge keeping cutoff voltage constant, lower current rate would have additional capacity available, above that cutoff voltage, than higher one. Discharge rates are commonly specified as multiples of the C rate, which is the current that will discharge the battery to the cutoff voltage in one hour. 1C rate means battery will be discharged completely in 1 hr by the discharge current.

=== Charge Current Rate ===

=== Continuous or Intermittent Discharge ===

When a battery rests after discharge, voltage recovery happens due to certain physical and chemical changes happening. Thus, the voltage of a battery that has dropped during a high-rate discharge will rise after a rest period. This improvement is generally greater after discharge at higher currents and also is dependent on the end-of-discharge voltage, temperature, and the length of the rest period.