I can't use laptop_mode_tools because my acpi-bios doesn't give the information about the present discharging rate to the os.
Steps to Reproduce:
The remaining battery time should be calculated or stopping the latopmode
based on the value of remaining capacity..
# cat /proc/acpi/battery/BAT0/state
capacity state: ok
charging state: charging
present rate: unknown
remaining capacity: 5940 mAh
present voltage: 14800 mV
Nothing much we can do about your laptop having a broken BIOS. You could try contacting your laptop vendor or upstream for a solution.