OS: Ubuntu 22.04.1 LTS
System 76, Galago pro 6 galp6
firmware version:
/sys/class/dmi/id/bios_version
2022-08-03_26f97c8
Symptom: Just a moment ago, the battery was showing over 90%, and then the next minute, ubuntu says battery is critically low. Plugged in the AC charger and now battery seems to charge very very slowly, or at least there's some kind of accounting problem with the batter percent.
When I unplug the battery now it shows 16% remaining, but over 2 hours of usage time:
---
output of "upower -i /org/freedesktop/UPower/devices/battery_BAT0"
```
upower -i /org/freedesktop/UPower/devices/battery_BAT0
native-path: BAT0
vendor: Notebook
model: BAT
serial: 0001
power supply: yes
updated: Tue 28 Apr 2026 02:07:01 PM EDT (1 seconds ago)
has history: yes
has statistics: yes
battery
present: yes
rechargeable: yes
state: discharging
warning-level: low
energy: 7.0528 Wh
energy-empty: 0 Wh
energy-full: 43.7608 Wh
energy-full-design: 51.528 Wh
energy-rate: 2.4776 W
voltage: 17.36 V
charge-cycles: 726
time to empty: 2.8 hours
percentage: 16%
capacity: 84.9263%
technology: lithium-ion
icon-name: 'battery-caution-symbolic'
History (rate):
1777399620 2.478 discharging
1777399595 16.127 charging
1777399582 2.493 discharging
1777399576 14.470 charging
1777399570 1.885 discharging
```
---
Output of "/sys/class/power_supply/BAT0"
```
./uevent
POWER_SUPPLY_NAME=BAT0
POWER_SUPPLY_TYPE=Battery
POWER_SUPPLY_STATUS=Charging
POWER_SUPPLY_PRESENT=1
POWER_SUPPLY_TECHNOLOGY=Li-ion
POWER_SUPPLY_CYCLE_COUNT=726
POWER_SUPPLY_VOLTAGE_MIN_DESIGN=15200000
POWER_SUPPLY_VOLTAGE_NOW=17360000
POWER_SUPPLY_CURRENT_NOW=138000
POWER_SUPPLY_CHARGE_FULL_DESIGN=3390000
POWER_SUPPLY_CHARGE_FULL=2819000
POWER_SUPPLY_CHARGE_NOW=467000
POWER_SUPPLY_CAPACITY=16
POWER_SUPPLY_CAPACITY_LEVEL=Normal
POWER_SUPPLY_MODEL_NAME=BAT
POWER_SUPPLY_MANUFACTURER=Notebook
POWER_SUPPLY_SERIAL_NUMBER=0001
./charge_full_design
3390000
./serial_number
0001
./technology
Li-ion
./current_now
138000
./charge_now
467000
./present
1
./power/runtime_active_time
0
./power/runtime_active_kids
0
./power/runtime_usage
0
./power/runtime_status
unsupported
./power/autosuspend_delay_ms
cat: ./power/autosuspend_delay_ms: Input/output error
./power/async
disabled
./power/runtime_suspended_time
0
./power/runtime_enabled
disabled
./power/control
auto
./manufacturer
Notebook
./charge_control_start_threshold
0
./type
Battery
./charge_full
2819000
./capacity
16
./cycle_count
726
./voltage_now
17360000
./status
Charging
./alarm
0
./model_name
BAT
./voltage_min_design
15200000
./capacity_level
Normal
./charge_control_end_threshold
100
./hwmon1/uevent
./hwmon1/in0_input
17360
./hwmon1/power/runtime_active_time
0
./hwmon1/power/runtime_active_kids
0
./hwmon1/power/runtime_usage
0
./hwmon1/power/runtime_status
unsupported
./hwmon1/power/autosuspend_delay_ms
cat: ./hwmon1/power/autosuspend_delay_ms: Input/output error
./hwmon1/power/async
disabled
./hwmon1/power/runtime_suspended_time
0
./hwmon1/power/runtime_enabled
disabled
./hwmon1/power/control
auto
./hwmon1/curr1_input
138
./hwmon1/name
BAT0
```