Duracell Rechargeable Pre-Charged NiMH batteries let you charge hundreds of times, helping you save money. With its Ion Core technology you get amazing power in every battery. Plus, they come pre-charged and ready to use. They are guaranteed to last for 10 years* in storage and they will hold a charge for up to 1 year when not in use. These powerful NiMH batteries work in any NiMH charger and you can recharge them up to 400 times. *or up to 400 recharges, whichever comes first., DURACELL AA BATTERIES: The Duracell Rechargeable Double A battery is designed for use in video game controllers, wireless electronics, baby monitors, and more., RECHARGEABLE BATTERIES: These powerful NiMH batteries work in any NiMH charger and you can recharge them up to 400 times, helping save you money., LONG LASTING CHARGE: Designed and developed with Ion Core technology. You can get hundreds of cycles out of each Duracell Rechargeable battery., GUARANTEED 10 YEARS IN STORAGE: Duracell Rechargeable are guaranteed to perform for up to 10 years in storage * in storage and will hold a charge for up to 1 year when not in use., #1 TRUSTED BATTERY BRAND: Duracell Rechargeable batteries are available in Double A (AA) and Triple A (AAA) sizes.