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When plugged into a power source, the SP Gadgets Powerbar Duo allows you to charge two GoPro® batteries at once. When you're on the go, the Powerbar Duo acts as a powerbank with enough juice for two more batteries. As a total bonus feature the USB out lets you charge any USB device, rad. A dead battery can mean the difference between getting the shot or getting shut down. Don't let that happen to you.
USB cable and protective bag
Compact and sleek design
LED power level indicators
Li-Polymer
Capacity – 2Wh, 3120mAh (enough for 2 batteries)
Input – 5V, 1A
Output – 5V, 2A
Hero3 or Hero3+ batteries