LaFonera Hardware Power-Sources
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Fonera Battery Pack or Car-Adaptor
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You can use every Car USB Charger (5V Output) and connect it to La Fonera or build it yourself with a LM7805 voltage regulator and a little heatsink. With one of this circuits you can power the fonera with batteries which have more than 6Volts. You can even use a LiIon battery and a stepup circuit. (or power la fonera from the inside without the 3,3V regulator)