I got interested in grapheneos last year and bought a pixel 5 to install it on. It worked great and I enjoyed playing with it for a few months, but life got in the way and I neglected to keep the phone plugged in. Yesterday I remembered the phone and got it out to mess with it, but it would not charge past 1% no matter how long I left it plugged in.
I can still open the phone and see my owners account and the apps I installed, but it only works for a minute before the battery dies. Is there a way to update an out of date phone? Is the fact that it's not updated the reason why it won't charge?