The number of portable gadgets that we use has grown substantially in the last few decades. Many of these, such as TV remote controls, some digital cameras, handheld GPS units, and flashlights, are designed to operate on either disposable alkaline batteries or rechargeable, and hence reusable, Nickel-Metal-Hydride (NiMH) batteries.

At the same time as our battery-powered device use has increased, rechargeable battery technology has improved dramatically. Unfortunately, information on the proper care and use of these batteries can be hard to find. This article attempts to provide this information and answer the questions I am often asked.

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