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Why Didn't Anybody Think Of This Sooner?

This is one of the coolest inventions I've ever seen: A rechargeable AA battery with a built-in USB connecter that you can plug into any USB port to charge. Just flip back the tip and plug it in. Very nice, indeed.

Posted by Jake on 10/10/06 @ 05:32 PM
Posted in Cool, Geekdom | 1 Comment | Permalink



1 Comment

Paul Lammertsma said on 10/10/06 @ 06:38 PM:
My understanding of battery technology leads me to believe that not only would this is not be economically feasible, but such a battery would have extremely little power simply due to the limited amount of space physically left over for the chemicals.

Indeed: the FAQ states that the USBCELL's delivers 1300 mAh. NiMH batteries of the same size go up and beyond 2600 mAh -- twice that of USBCELL. Bear in mind that Alkaline batteries (non-rechargeables) are rated at about 350 mAh, so the argument of power doesn't cut it.

Also remember that charging a single USBCELL takes five hours and, like any other NiMH, they don't last forever (about 1000 cycles and 30% discharge per month). Paying over $15 for a pair is expensive.

Instead, buy some good, heavy duty NiMH batteries and a mini two-hour charger instead (both preferably from a trusted brand). The batteries are less than half as expensive and charging is quicker and more reliable. This will save you time and money.

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