Memory Effect Memory effect is caused by the accumulation of gas bubbles on battery cell plates when the battery has been partially discharged and then recharged. The key to eliminating memory effect is to fully discharge or drain your battery before recharging. NASA has determined that negative pulse technology is the best form of charging for NiCd and NiMH batteries. Properly conditioning your battery is the best method to ensure maximum performance and to extend the life of your battery. We recommend that you periodically clean the contacts on your battery, charger and portable device using a cotton swab and rubbing alcohol.
Dirty contacts are often the factor limiting battery performance.
Storage Store batteries in a cool, dry place away from heat and metal objects. Refrigerators are NOT a good place to store your batteries because there is too much moisture inside and many refrigerators have metal racks. In any case you should keep all battery chemistry away from food items. Remember to charge batteries stored for more than a week before use. Store NiCd, Li-Ion and NiMH batteries discharged.