Long Answer: Alkaline
batteries last the longest, but most consumer tests don't show a
significant or consistent difference in life from brand to brand, so buy
whichever is cheapest or on sale. Alkaline batteries designed for
high-performance use will give you a few more hours of life for a
slightly higher price. If your device uses watch or hearing aid
batteries, use the lithium-ion type.
Rechargeable batteries also perform well,
and have the benefit of reducing environmental toxins and waste. They
are slightly less convenient than disposables, as they take time to
charge, and they require the initial investment for a set of
rechargeable batteries and a recharger. Note: Do not attempt to recharge
standard disposable alkaline batteries; they may explode.
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