Tenergy's Centura rechargeable AA batteries energy savings by switching from household AA batteries to rechargeable batteries. Centura low self-discharge AA battery can retain up to 85% of capacity even if stored for 1 year. Rechargeable up to 2,100 times without significant capacity lost. Avoid wasting time and money on the disposable alkaline batteries and replace them with our rechargeable 1.2V AA battery to decrease the waste disposables leave behind. Use these double A batteries when first received, or fully recharge them for the best experience. AA batteries are UL certified and include 12 months warranty.