Again though, the Energizer rechargeables still lasted longer than a set of single-use alkaline batteries, which kept going for 40 minutes. These rechargeable Ni-MH AA and AAA batteries come from ...

both Duracell and Energizer sell a ‘one hour’ charger, among other models. Exactly how long it will take depends on the capacity of your rechargeable batteries. In the same charger, higher-capacity ...