Have a look here: Advice on battery use
Additionally just 2 cents: Running 7 Windows Computers + 1 Librem with PureOS i’ve got to admit, if i wouldn’t have been finally fed up with using Windows, the Librem i’m currently typing at would be a perfect hardware platform for continued usage of Windows or whatever system. Why? Beside all the other Pros just because of the hardware killswitches together with the nice slim, sleek finish.
Happy with PureOS now. But if i wouldn’t have been totally fed up, i’d have tried installing Windows. Beside that Purism is a small company and it’s good that they try to keep focused on their path.