cross-posted from: https://lemmy.ml/post/10113624
what's a reliable way to determine my device's battery health? something like Coconutbattery for macOS - charge cycles, health, factory/remaining mAh, etc...
tried CPU-Z, says health is "Good". gee, thanks... out of what, "Excellent" through "Shit" or what?
backstory, I got a Samsung Tab S6 used, wiped it and installed LineageOS 20 and I'm using for a couple of months. the battery kinda sucks. granted, I have like 3-4 hours SOT/day but a 7000 mAh battery should last a couple of days; pure guesstimation, I had an iPad some years ago and that thing lasted for eons.
if I leave it overnight with 10ish% battery remaining and battery saver on, it's dead by morning. that sort of drain can't be normal? on the other hand, I don't have google services so every app has its own running service - syncthing, KDE Connect, Allcast, Jellyfin Player, etc.
there's the stuff I can read from
/sys/class/power_supply/battery/but nothing useful in there; likecharge_fullandcharge_full_designare the same (70400) and other promising sounding items are unset or nonsensical.
tried the same on my Redmi phone w/LOS, completely different files there and equally useless.
I don't wanna go through sourcing the battery, prying the thing open and replacing it, only to find out that's how it's supposed to work. any ideas?
It depends on the phone. Some phones will allow access, other phones will not. My S3 had the guess with acubattery, my moto e2 lte had acubattery read stats just fine from the controller.
Both ran custom roms
(S3 and e2 lte were on lineage os)