Duracell Rechargeable Battery Kit with 4 x AA Batteries and 4 x AAA BatteriesDuracell Rechargeable batteries are guaranteed to last for 10 years in storage, and 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. From storm season to medical needs to the holidays, Duracell is the#1 trusted battery brand Features: Now with higher capacity cells (AAwith 2500 mAh, AAA with 900 mAh) You can recharge them up to 400 times Guaranteed