Minty Boost: Portable USB Charger
"This project details a small & simple, but very powerful USB charger for your mp3 player, camera, cell phone, and just about any other gadget you can plug into a USB port to charge!
The charger circuitry and 2 AA batteries fit into an Altoids gum tin, and will run your iPod for hours! 2.5x more than you'd get from a 9V USB charger! You can use rechargeable batteries too.
Some numbers...
iPod video (tested, using alkaline batteries): 3hrs more video (1 full recharge)
iPod shuffle (not tested): 60 hours more (5 full recharges)
iPod mini (tested w/rechargables): 26 hours more (1.5 full recharges)
This project is suitable for beginners, some soldering tools are necessary but even if you've never soldered before it should be pretty easy. You can etch a circuit board and/or breadboard this up, or simply buy a kit from the web shop."
This device can be easily recreated by anyone on their own or can be purchased.
To get full instructions or to buy, click here
There is also a solar powered minty boost
Instructions for making the solar powered version can be found here
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