Bought 2 extra batteries for RunCam Scope Cam 4K, as shooting constantly drains one in approx 1 hour. Expected the battery to last longer, thus a bit of dissapoitment here (4/5 stars).
It's light weight, combined with light weight of camera, does not feel at all on the RIF. Though, when purchasing extra batteries for your camera, it would be nice to get a suggestion from the site to get a charger as well (technical issue), regardless you can charge the batteries with the camera.