my thinkpad battery was charged to 100% for almost a day

(meanwhile, my nintendo switch battery has been sitting at 100% for approximately 4 years and holds a charge of less than 10 minutes)

i wish the nintendo switch could at least boot without a battery installed, but nope

do i remember how to limit charging to 50%…

@kemona_halftau on the stock firmware you should use thinkpad_acpi but if you happen to be on coreboot on an thinkpad between ivybridge (3rd gen/xx3x) and kaby lake refresh (8th gen/xx8x) (maybe also earlier and later versions but I haven’t confirmed that, doesn’t work on X200) you can use ectool from coreboot:

# to set the charging start threshold to 50%
ectool -w 0xb0 -z 0x32
# to set the charging end threshold to 50%
ectool -w 0xb1 -z 0x32

@noisytoot i already figured it out (echoing 50 to a hardware device file) but thanks