Review on Gnolkee WiFi Action Camera: 4K 16MP Underwater Video Cam 170° Wide Angle - Remote, 2 Batteries, 16GB TF Card, 24 Accessories - 2020 Upgrade by Jose Haskin

Batteries are not included in the charger. This seems to be a common problem with this seller. Now the battery in the camera needs to be charged, which causes the camera to get very hot and takes some time to charge. Heat is bad for electronics. The images were good initially, but during the video shoot, the camera darkened and didn't correct itself. I didn't change any settings and the lighting was the same. The phone app is slow.