RCNZ AA Ni-MH Rechargeable Battery replaces the standard Ni-Cd Battery or ordinary Alkaline with up to 300% longer life. Rapid charge up and long cycle life - recharge up to 1000 times that's one full charge and use a day for 3 years. -No memory effect, no need to drain completely before recharge, get the same capacity after every recharge -Gives better performance designed to work well in all high drain electronic applications Much safer for the environment than alkaline, Ni-Cd & lithium ion, can be safely thrown away or recycled