These Duracell rechargeable batteries AA, with Long-Life Ion Core technology and a long-lasting charge that requires fewer recharges, really do set themselves apart from the rest. They are ideal for video game controllers, wireless electronics, baby monitors, and other heavy-use devices; many choose them as a backup power source. If you are interested in gaming or are a gamer, you want long-lasting power. Duracell Rechargeable Pre-Charged NiMH AA batteries let you charge hundreds of times. Plus, they come pre-charged and ready to use. They are guaranteed for 10 years in storage or 400 recharges, whichever comes first, and will hold a charge for up to 1 year when not in use. These AA NiMH rechargeable batteries work in any NiMH charger. From storm prep to holiday needs, Duracell is the # 1 trusted battery brand.