Critical discharge UPower level of Aspire Acer One AOA150

Trying to get a reliable estimation when it is time to switch from battery to power supply (or shut down the netbook).

Using GNOME battery status applet and upower tool (they are coherent). At present when percentage is about 50% the netbook abruptly turns off with no warning or a chance to shutdown proper.

Possible explanations:

  • 50% is the critical discharge level
  • UPower’s algorithm of calculating discharge level doesn’t fit the hardware I have.

In the latter I’d appreciate any hint how to fix it.

Experimentally I found that it takes five hours for the netbook to turn off.

Netbook: Aspire Acer One AOA-150  Battery model: UM08A71 System: Debian GNU/Linux 9.6 (stretch) UPower client version 0.99.4 GNOME Shell 3.22.3 


$   upower -i $  (upower -e | grep BAT)   native-path:          BAT1   vendor:               SIMPLO   model:                UM08A71   serial:               1000   power supply:         yes   updated:              Fri 08 Mar 2019 04:20:30 PM EET (65 seconds ago)   has history:          yes   has statistics:       yes   battery     present:             yes     rechargeable:        yes     state:               fully-charged     warning-level:       none     energy:              144.023 Wh     energy-empty:        0 Wh     energy-full:         144.023 Wh     energy-full-design:  96.1038 Wh     energy-rate:         3.7407 W     voltage:             12.523 V     percentage:          100%     capacity:            100%     technology:          lithium-ion     icon-name:          'battery-full-charged-symbolic'   History (rate):     1552054830  3.741   fully-charged 


$   upower -e | grep BAT 

returns /org/freedesktop/UPower/devices/battery_BAT1. I found no clue what is this.