Rapid Charge
A charge time that is between slow charge and fast charge (typically 3 to 6 hours for a NiCd).

Rated Capacity
The number of ampere-hours a battery can deliver under specific conditions (e.g., rate of discharge, end voltage, temperature); usually specified by the battery manufacturer.

Rechargeable battery
A galvanic battery which, after discharge, may be restored to the fully charged state by the passage of an electrical current through the cell in the opposite direction to that of discharge.

Recondition
One or more deep discharge cycles below 1.0 volt/cell at a very low, controlled current. Recondition helps to revert large crystals to small desirable sized, often restoring the battery to it's full capacity.

Resistance
The degree to which the flow of electrons is opposed by the material the electrons must pass through. Resistance is expressed in OHMS.

Reversal
The changing of the normal polarity of a battery due to Overdischarge.