Sanyo Eneloop Rechargeable
Sanyo Eneloop Rechargeable

Best rechargeable batteries

Experts and users alike rave about Sanyo's Eneloop rechargeable batteries. They come pre-charged and ready to use and lose their charge extremely slowly, so they're still 75 percent charged after three years in storage. Furthermore, Eneloops can be recharged up to 1,500 times, so they're much more cost-effective than disposables.
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*Est. $12 for four AA Estimated Price
Energizer Ultimate Lithium
Energizer Ultimate Lithium

Best disposable lithium batteries

Energizer's Ultimate Lithium receives a lot of praise for being able to effectively power high-drain devices. Tests conducted by experts prove that not only are these batteries powerful, they also last long. Lithium batteries are light, work well at low temperatures and have a long shelf life of up to 10 years.
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Duracell CopperTop
Duracell CopperTop

Best disposable alkaline batteries

In tests of standard alkaline cells, Duracell CopperTop batteries last just as long as or longer than other alkalines -- even pricier advanced or ultra types. Users say the CopperTop is less likely to leak than off-brand batteries, and if it does Duracell will repair or replace your device. Alkalines are the best value for low-drain electronics like smoke detectors.
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