Motorola P790 Portable Charger is a battery backup which can serve to fill the phonebattery when the drop and away from the power source. To fully charged, this cool gadget takes about 2-3 hours of charging. With full power capacity could add to the power1 to 2 hours talk time

How it works is quite simple as stay plug into the phone which has a mini USB. This usefull gadget can also make the filling for two devices at once but needed an additional cable that can be purchased separately. Appearance product is quite simple and not too big so be easily stored

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