Duracell AA 1300mAh 1.2V NiMH Pre-charged Rechargeable Batteries. DURALOCK - STAYS CHARGED - GUARANTEED TO LAST FOR 3 YEARS* *Retains 80% of its charge for up to 6 months when not is use. Duracell Stay-Charge batteries come pre-charged out of the pack. And not only will you get hundreds of uses out of each battery, but they stay charged longer. Pre-charged Duracell Features: - Stays charged for up to 12 months. - Pre-charged, ready to use out of the package. - 1 charge up to 45 hours in wireless mouse. - 1 charge up to 7 hours in gaming controller. - 1 charge up to 250 pictures. Battery voltage: 1.2V