The loss of useful capacity of a cell or battery due to internal chemical action.
|Lithium Ion||2% to 3% per month|
|Lead Acid||4% to 6% per month|
|Nickel Cadmium||15% to 20% per month|
|Nickel Metal Hydride||30% per month|
For most battery chemsitries the higher the temperature during storage, the greater the rate of self-discharge.
See also: Battery.