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Issue Date: December 2, 2007
5 things you need to know about batteries
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1. Stick to basic alkaline batteries for toys, remote controls, flashlights and sporadically used items that don't need mega power, says Paul Klatt of Batteries Plus, a Wisconsin-based franchise. "For digital cameras, which drain power fast, many brands (Panasonic Oxyride, Duracell PowerPix) make a nickel oxyhydroxide battery that's a step up," he says.
2. Go for nickel-metal hydride (NiMH) rechargeables for real power-suckers -- digital cameras, CD players and power tools -- because they're the best, most cost-effective choice, Klatt says. "An alkaline battery takes 50 to 60 pictures. An oxy nickel may take hundreds," he says. "But a NiMH battery can take 200 to 400 on one charge -- and you can recharge it up to 500 times!" Cons: You need a charger and must power up before use.
3. Special rechargeable batteries, usually lithium-ion, come standard in laptops, electronic games and cellphones. "Smaller and more powerful than NiMH batteries, they are becoming the choice for consumer electronics," says Peter Roth, a battery researcher at Sandia National Laboratories. They are intended for a specific use and are not sold in common individual sizes (AA, C) for general use.
4. Charge with caution. To extend the life of a battery, do not overcharge it, Klatt says. "Ideally, once it's charged, remove it from the charging source," he says. "For example, don't keep your Nintendo DS plugged in or your cordless tool in its base. Continuous charging generates heat, which is detrimental."
5. Protect your home. Smoke alarms take standard 9-volt batteries, or some come with an enclosed, 10-year lithium battery. Test each one monthly to make sure it works.
By Frappa Stout
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