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AAA Usb Charger Help

I just bought a new Sansa e260 and I've been looking at these usb chargers but they all use 9v or AA and i have a ton of rechargeable AAA battery's, There 1.2 v so 5 will be 5v. Will this work if i just make a case draw the power from them out via usb?

warlord10 years ago
use 4 AAA and you'll end up with about 5v +/- depending on state of charge. The only difference with using AAA's is that you have a lower capacity. So you'll be able to do fewer recharges with it. The plus side is that you'll have a smaller package.

https://www.instructables.com/id/EEAVXXDF15QB5E9/
trebuchet0310 years ago
You may want to check out Ladyada's MintyBoost ;)
https://www.instructables.com/id/EGBQJPLCB2EP287KTZ/

You should be able to use AAA batteries instead of AA - it will have less charge time, but it's more efficient than most alternatives ;) She even sells a kit :P
LeetLandon (author) 10 years ago
Well then would 4 work? (4.8v)
photozz10 years ago
yes, it will work, to an extent. the only real difference will be how long the batteries will last. AAA batteries are smaller than AA bats. They carry less amperage, and so may draw down faster than their larger cousins. If your going to use 5 of them, make sure the charging circuit you pick uses some kind of voltage control, as 5x1.2v=6v. and 6v could blow some devices if it's expecting 3-5v.