Rayovac Rechargeable AA Batteries last up to 2x longer than standard alkaline Rayovac AA batteries in your digital camera. Each double A battery is designed for lasting use. Use the NiMH batteries for high-use devices, like game controllers, wireless mice, flashlights and more. Rayovac Rechargeable batteries are pre-charged and ready to use. Or save the AA battery pack - the chargeable batteries last up to a year. Charge the NiMH rechargeable batteries in any Rayovac AA battery charger. Less waste, more power - you get more with Rayovac. For optimal performance, charge batteries prior to using.