Going out on a limb here, but when both inxi and upower report that the battery is at +/-25% capacity, I suppose it is time to replace it... 🤔
upower says: "capacity: 24.3902%"
inxi:
$ inxi --battery
Battery:
ID-1: BAT0 charge: 11.4 Wh (100.0%) condition: 11.4/46.7 Wh (24.4%)
That would explain why the battery only lasts about one hour vs 4h previously... 🤦♂️