I have installed Linux on my laptop and running it as the only system. It displays both batteries on the desktop UI, with the first one on 100% and second 0%.
When it is discharged it just discharge the main one and shuts down when it goes to 0%. This defeats the purpose of having 2 batteries.
I tried to look for battery info under /proc/acpi/battery/ but found there are no battery directory under /proc/acpi/.
I could get some info from upower:
$ upower -i /org/freedesktop/UPower/devices/battery_BAT0
native-path: /sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:09/PNP0C09:00/PNP0C0A:00/power_supply/BAT0
vendor: SANYO
model: 42T4845
serial: 20914
power supply: yes
updated: Sat Sep 10 19:25:42 2016 (4 seconds ago)
has history: yes
has statistics: yes
battery
present: yes
rechargeable: yes
state: fully-charged
energy: 33.4998 Wh
energy-empty: 0 Wh
energy-full: 33.8439 Wh
energy-full-design: 43.9893 Wh
energy-rate: 1.6206 W
voltage: 12.532 V
percentage: 98.9833%
capacity: 76.9367%
technology: lithium-ion
$ upower -i /org/freedesktop/UPower/devices/battery_BAT1
native-path: /sys/devices/LNXSYSTM:00/device:00/PNP0A08:00/device:09/PNP0C09:00/PNP0C0A:01/power_supply/BAT1
vendor: SONY
model: 51J0508
serial: 1266
power supply: yes
updated: Sat Sep 10 19:25:22 2016 (27 seconds ago)
has history: yes
has statistics: yes
battery
present: yes
rechargeable: yes
state: charging
energy: 0 Wh
energy-empty: 0 Wh
energy-full: 32.4108 Wh
energy-full-design: 31.32 Wh
energy-rate: 0 W
voltage: 11.225 V
percentage: 0%
capacity: 10.6897%
technology: lithium-polymer
Both battery was working nicely while I was running Windows, one gets discharged then the other, and warns me to plug in when only one had charge of about 10%.
The laptop is a Thinkpad T420s running CentOS 7.
Is there some package or driver that I need to install to get both batteries to work?
