My old Polaroid Cube+ can hardly manage 35-40 minutes from its own battery shooting 1080p/60fps (my regular Cube can only do 30fps with a slightly longer runtime - 45,maybe 50 minutes if I'm lucky.) With a compact, fairly lightweight 5,000mAh powerbank velcroed (scotched, actually... scotched-velcroed, to be exact) to my helmet, either one can run for almost four hours, which is, more often than not, more than long enough for me. And those used to be $100+ cameras when they were new.