It isn't the battery, it isn't software. it is a connection inside. 4 minute fix.
Open the back, remove the stock tape on the three contacts and replace with black electrical tape. I hear a band aid will also work, but the electrical tape is likely cheaper. I used a white plastic knife to open it. From open to close it took all of five minutes. Here is the video. https://www.youtube.com/watch?v=1L0ihzx3...