Delkin extended-power rechargeable AAs are nickel-metal hydride manufactured and energy-infused to offer 30-40% higher capacity than nickel-cadmium batteries. The "no memory effect" property of these cells means no unexpected loss of charge over time or during extended use, a common attribute of nickel-cadmium cells. Unlike other rechargeables, Delkin Power batteries do not require fully charging or periodic discharging, and weakening currency will never be an issue. When compared to disposable alkaline batteries, the single charge of a NiMH battery will last up to 3-4 times longer. Advanced safety features and non-toxic metal manufacturing eliminate any possibility of overheating, short circuiting or further electrical hazard. Plus, this sustainable, recyclable Delkin battery has proven to have less of an impact on non-renewable natural resources by 23 times, global warming by 28 times and air pollution by 30 times in comparison to the average disposable.