New Xiaomi Yi 2400mAh Yi Camera Xiaoyi External bacpac Battery +backdoor of Housing for Xiaomi Yi sport camera accessories

Fits the US model perfectly. Almost 3 times the recording time of the original Yi camera battery (WIFI turned off). No battery charger needed just plug the supplied micro USB cord directly into the battery after plugging the USB end into your power supply. There is a red indicator light when charging. When done charging an alarm sounds and the red indicator light goes off. I recommend using a rubber band or gasket to put around the camera and battery between the lens and power button to ensure no separation. Only the back door of the waterproof case is supplied, NOT the whole case. I have not tried to use it with my original Yi waterproof case. Battery alone is worth the price.

UPDATE: The seller sent me a waterproof case that does work with the supplied back housing. But the issue remains - the housing doesn't work with the stock waterproof case. Also, wanted to add some real-world metrics since getting the replacement case and actually using it. At 1080p 60fps, I get about 3 hours of shooting time. A huge improvement over the stock battery, obviously. I will still need to order a second, as I often go on rides longer than this.The back housing does not fit the official yi camera case. The clip on the waterproof case is about a millimeter too wide for the groove in the back housing supplied with the battery. I've reordered, hoping it's just a defect with the one sent to me but not hopeful. Will update this review if necessary.

good