This is a ‘how to’ for battery threshold setting on Lenovo laptops with Windows 8 and 10 systems when your battery recharges fully after the system restart.
I’ve recently updated my ancient Lenovo laptop to Windows 8. To prolong lifespan of my battery I had to setup again the charge thresholds to not start charging the battery sooner then bellow 5% and stop up at 100% using PowerManager 6.36 with 18.104.22.168 PowerManager driver.
However, after system restart the battery started to charge fully every time – a way to significantly shorten it’s lifespan.
To fix it I did some search. First, install also install ThinkPad Settings Dependency for Windows 10. Then there are forum posts how to fix charge thresholds manually (doesn’t work after update to Windows 10) and one more also for the Windows 10 issue.
Changing ChargeStartControl, ChargeStartPercentage, ChargeStopControl, ChargeStopPercentage registry keys under HKEY_LOCAL_MACHINE\SOFTWARE\Lenovo\PWRMGRV\Data didn’t help.
The correct registry settings are located elsewhere:
HKEY_CURRENT_USER\Software\Lenovo\PWRMGRV\Data\<your battery serial number>\
If missing, create it. The serial number should be found under
PWRMGRV\ConfKeys\Data\ as a registry subdirectory.
You may need to manually create any missing DWORD values, in my case those are (in hex):
After you do the changes, restart your machine.
These settings then produce the following status that persists after system restart: