I had a DR650 and no issues charging my phone with a USB adapter. I even ran heated gear. I use a USB adapter hooked to my battery tender plug. I use it between multiple bikes
Originally Posted by Overland Hadley
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Charge from a power source like a bike if you can,
Solar is an expensive back up and better suited if you aren't near an engine.
Plus the dollar to watt generated is just not a great return.