Several months into using a GoPro I’m still on the fence as to its utility as a device used for general purpose photography during bike rides. I really like the ability to shoot “on the move,” but that is almost outweighed by the fisheye character of the shots you wind up with, plus the fairly work intensive nature of getting them off the GoPro and onto a computer or handheld in a form that they can be used. It annoys me that you have to hand add geolocation to each photo.
Anyway, the thing I had in mind when I took these shots was to note another drawback and my fix for it. The internal battery in a GoPro- at least a Hero 4 Silver GoPro- literally lasts for minutes- not hours, minutes- of constantly connected use. Then they die without warning. The best accessory purchase I have made so far is two of these “re-fuel” six hour battery backs [link]. They snap right on and are ready to go. Six hours is a stretch- I get about four, tops. But two will carry me through most days. I don’t know what folks who have the newer model GoPro can do- I understand that they are caseless, so these won’t fit. But there must be something like them.