When charging, the power supply still shows 14%.

This is a problem created by government soft. Just think back to apple and the iphone 6 . Apple was manipulating the phones so people would upgrade. They got caught slowing down phones and messing with the charging. You can try all their nonsense , like cmd run as administrator and then fix the corrupted drives for the battery in the device manager and it will do nothing. you can uninstall the drivers in the device manager and restart and nothing will change. How it is suppose to operate is that removing the drivers out of device manager will recalibrate the battery. But you only get a few times or one time and then basically the drivers are bricked till you get a new battery. In closing no battery works one day fine and then the next does not. They get weaker and weaker until they wont take a charge. which means a battery should only last for a half hour before it is discharged all the way when it is weak unless you are under government soft control then as soon as it is weak it will be bricked. No way they let this post stand.