Store rechargeable batteries at a cooler temperate to slow the discharge rate.
Nickel-Cadmium (Ni-Cd) batteries are slowly being replaced by lithium ion which do not suffer from the "memory effect." The memory effect can occur when the battery is charged, then recharged again before it reaches zero. The battery "remembers" the short charge and will be limited to that amount. Rechargeable batteries will not hold a charge forever and only last for a certain number of recharges. Proper maintenance of an Ni-Cd battery does not end when it is stored, and the way it is stored has a huge impact on its lifespan.
Instructions
1. Charge the battery pack partially before putting it away for an extended period of time. A 30 to 50 percent charge will protect it from damage. Never store an empty battery or it may not recharge the next time it is used. Instead, keep the charge low to ensure that when you recharge, it will be closer to empty than full.
2. Keep the battery in a clean, cool and dry place. Batteries suffer from extreme temperatures, both hot and cold. 15 degrees Celsius/59 degrees Fahrenheit is an ideal temperature to minimize the amount of discharge, but anywhere between 30 and 80 degrees Fahrenheit is acceptable. Even in the best conditions, rechargeable batteries are expected to lose 10 to 15 percent of their charge monthly.
3. Place batteries individually in plastic storage bags if you have more than one. Put the baggies in a non-metal container that is out of reach of children and pets, as they may be small enough to be swallowed accidentally. When they reach expiration, take them to a recycling center that will accept rechargeable batteries.
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