sry bad english.
RD32II camera with loop-recording function.
Inner battery wires brought out from camera.
Created 1S8P Panasonic NCR18650A batteries for winter using.
So >20Ah instead of 1Ah, more than 50 hours video per charge. So even 1 hour of commuting per day, then charging every 1.5 month.
Outter battery is native for camera, so charged by USB port.
Mtbr's 2016 Winter Biking GearReviews and Roundups
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Thread: My semi auto Bicycle DVR