Condition in which the battery has caused the end-use device to fail to function at the performance level expected.

A condition which does not permit a cell or battery to be reconditioned or restored to an acceptable performance level.

Failure condition which may be corrected through the application of certain electrical procedures.

Rapid return of energy to a battery at the C rate or more.

A method of maintaining a cell or battery in a charged condition by continuous, long-term, constant voltage charging at level sufficient to balance self-discharge.

A cell design which incorporates an excess amount of electrolyte, also see Vented Cell.