It's more than likely your battery needs to be calibrated by charging it as much as it will charge and then depleting the battery to 0%. This needs to be done a number of times.
Also, what firmware version is your camera running?
I would perform a manual update of your camera just in case there was a firmware issue, a manual update will also help ensure that's it's running correctly.
@peppywater521, if the issue persists after going through the suggested troubleshooting steps, our Support team will be able to assist you with the next steps. You may reach out to them through https://gopro.com/help/ContactUs to initiate a callback request or chat with one of the representatives. When you get a hold of them, let them know about the troubleshooting steps already taken for any information that they may need.
