USB Battery Pack
Builtin batteries in gadgets have some advantages: they have more power and capacity, they last longer and they are usually lighter than replaceable batteries. But they have a huge disadvantage as well: when they are empty you’re out of power until you are back at home to charge them. The idea is simple. Use two standard AA batteries and some electronics to power your device through an USB cable. The electonics are needed to convert the 3 Volts of input delivered by your batteries to the 5 Volts wanted by the USB specs.
| USB Battery Pack Check out USB Battery Pack website www.splitbrain.org |
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