Download Free 3D Model Eken H9R Action Camera Battery Box 3D Print Model

Summary
Extreme capacity battery box for the Eken (SJCam, …) Action camera. The box will replaced the scuba housing back door and can carry up to two 18650 Li-Ion cells. They can provide up to 7000mAh (connected to parallel) power, meaning 7x operation time.
The cells are connected parallel to give voltage 3.7V-4.2V (as internal battery).
The wires are glued to the Battery Adapter treads. Make U-shape connectors to the upper end. See the picture and the original battery.
Obviously the box the hinder the visibility of the back screen when closed. Though you can power the camera up with the front button and press lower side button to active WiFi. Use the camera’s remote app to control it.
Ps. Note the printed unit might not be waterproof even if you’d add the shielding.