LaFonera Hardware Power-Sources

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LaFonera Battery Pack or Car-Adaptor

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

For those willing to take the LiIon approach, make sure you get a battery with built-in battery protection, which prevents the battery from bursting in flames (literally) when shorted, over or under-charged. It is also better to get a proper LiIon charger, which will work within the safe parameters of the battery.