Have you considered getting a large external battery? My 2015 T450s on Fedora still gets 6-10h battery life with 97Wh between the two batteries. Mostly stock with a repasted CPU 6 years ago (probably needs to be done again) and an M.2 2242 as the boot drive, with a 2.5" SSD as the D: drive.
Have you considered getting a large external battery? My 2015 T450s on Fedora still gets 6-10h battery life with 97Wh between the two batteries. Mostly stock with a repasted CPU 6 years ago (probably needs to be done again) and an M.2 2242 as the boot drive, with a 2.5" SSD as the D: drive.