Firstly, you need to know that almost all frequent rechargeable batteries are NiMH (nickel-metal hydride cell) and NiCd (nickel-cadmium). The abbreviation NiCd is derived from nickel (Ni) and cadmium (Cd). NiMH battery makes use of hydrogen-absorbing alloy as a substitute of cadmium. In case you simply purchased NiMH or NiCd, they must be totally discharged and charged three instances earlier than utilizing them. That method you’ll extend their life, in any other case the battery would possibly free its capability over time in a phenomenon often called “reminiscence impact”. It is OK to completely discharge batteries earlier than utilizing them even when they’re old.
Secondly, you need to know NiMH and NiCd batteries self discharge at a a lot quicker charge than Alkalines. It’s calculated that at room temperatures NiMH and NiCd will self discharge at a charge of few percents per day, whereas Alkalines will self discharge at a charge of lower than 2% per yr. So storing Alkalines in a freezer is not going to assist a lot, nevertheless it may assist in the event you did so with NiMH and NiCd batteries. NiMH’s saved in a freezer may retain over 90% of their energy for full month. Nevertheless, don’t use them instantly after taking out of the freezer. Wait till they attain room temperature. In case you do not wish to retailer your batteries in a freezer, retailer them in dry and funky place, with out warmth conditions.
Thirdly, rechargeable batteries ought to be totally discharged and charged a minimum of as soon as each three months.