Along with the converter, the gadget will need 2 AA batteries because this category of battery is the more universal kind and offers the best amount of current and voltage.
The device will need a 5V converter at 500mA that will be an essential part of the process when converting the battery voltage into a usable source. Essentially this piece of equipment will be a powerful USB charger for any mp3 player, camera, but most importantly to play the role of a portable cell-phone charger. This project idea is based upon a kit by designs. This project principal is to develop a cell-phone charging device that is portable.
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