Wednesday, February 07, 2007

USB Rechargeable Batteries

Here is the cool gadget of the day:

these are apparently available now at this site:

The price is also cheaper than I would have expected - £12.50 for a 2-pack of AA batteries.

They also have AAA and 9V batteries, and are apparently developing cell phone batteries.

I've seen some discussion about these. Apparently the USB design means they are really only half as efficient as normal Ni-mh batteries, which already have a fairly disappointing efficiency. An alternative was suggested, for longer life and lower cost, here. Of course, this one requires you to carry around a charger - but at least it's still a USB charger!

Another guy has actually done some detailed experiementation to analyze actual discharge results for different types of rechargeable batteries. His results are posted here.

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