If you are using xmonad and xmobar on debian SID on a laptop, and don’t see any battery information, you may have test this solution.
If this didn’t solve your problem, try this patch on SysfsBatt.hs :
52c52
< let path = sysfsPath ++ p ++ "/charge_full"
---
> let path = sysfsPath ++ p ++ "/energy_full"
62c62
< let path = sysfsPath ++ p ++ "/charge_now"
---
> let path = sysfsPath ++ p ++ "/energy_now"
74c74
< else showWithColors (printf "%.2f%%") stateInPercentage
---
> else showWithColors (printf "Batt: %.2f%%") stateInPercentage
Then as before:
runhaskell Setup.lhs configure --user
runhaskell Setup.lhs build
runhaskell Setup.lhs install --user
Battery information should be visible.