Letter Re: Shelf Life of NiMH Batteries?
No one seems to know about storing new NiMH batteries pre-charging for a long term, I wouldn’t try it with testing it for several years first as any chemicals of this type age with time. Here is some specific info on the storage and longevity of NiMH batteries, from Wikipedia and other battery FAQs. They are your best bet for power density and economy for rechargeables, but for really long term storage 5-10 years the single use Lithium type batteries are the best (and are available in AAA, AA, C, D and 9 volt sizes). Disposable alkaline batteries are designed …