Battery Saving Kits at All-Battery.com.
Rechargeable batteries are of the same sizes (AA, AAA, C, D, Sc and 9V) and are intended for everyday use are the throwaway or primary batteries people use. The advantage of rechargeable batteries is that they can be recharged and reused up to a thousand times and generally they greatly outperform standard everyday throwaway leading brand batteries. The fact that rechargeable batteries can be used again and again represents a massive saving over their useful life. Rechargeable NiMH batteries are also very popular simply due to the fact that they are extremely environmentally friendly. Once charged, these rechargeable batteries can be used in the same way as you would with your previously throwaway batteries of the same size.