Seldom unseen yet ubiquitous at CES are batteries. Last year Panasonic debuted its Oxyride non-rechargeable batteries. This year was Sanyo's turn to deliver an improvement on nickel-metal hydride batteries. Its new Eneloop batteries come fully charged, meaning you don't have to charge them for hours before using them. And Sanyo says they will hold that charge on the shelf almost completely for up to a year. (Most rechargeables discharge after a few weeks even if you don't use them.) Announced in Japan just before CES, they'll go on sale in the U.S. this spring for about $11 for a pair of AA cells.
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