No warning for low battery
I have searched relevant questions and nothing seems to be helping.
On ubuntu 20.04, all service packs up to date.
I don't get low battery warning. The battery indicator shows around 30% when laptop suddenly shuts down even if settings says percentage-low 10% to suspend. It does not suspend, it shuts down.
What can I do to get timely low battery warning rather than abruptly shutting down the laptop and loosing all my work?
So far I have got warning only once but that was also less than a minute - hardly time enough to get the power supply from other room.
Experience so far is low power warning is not present and if you get it, its not advance enough to act on it. Suspend or other dconf settings do not help. Laptop just shuts down.
Based on answers attaching the output of upower. I believe it's not looking that bad.
vendor: Hewlett-Packard
model: Primary
power supply: yes
updated: Sat 12 Jun 2021 05:21:10 PM PDT (90 seconds ago)
has history: yes
has statistics: yes
battery
present: yes
rechargeable: yes
state: fully-charged
warning-level: none
energy: 27.5648 Wh
energy-empty: 0 Wh
energy-full: 28.9664 Wh
energy-full-design: 28.9664 Wh
energy-rate: 1.2702 W
voltage: 16.667 V
percentage: 100%
capacity: 100%
technology: lithium-ion
icon-name: 'battery-full-charged-symbolic'
Like Salim says, this is a good indication that your battery may need to be replaced. You can check this either in the "Battery" tab of the Power Statistics application, or using upower
in the Terminal. For the sake of this exercise, let's use the latter:
- Open Terminal (if it's not already open)
- Get a report on your battery:
You will see something similar to this:upower -i `upower -e | grep 'BAT'`
~$ upower -i `upower -e | grep 'BAT'` native-path: BAT0 vendor: LGC model: 01AV494 serial: 58 power supply: yes updated: 2021年06月13日 06時32分57秒 (64 seconds ago) has history: yes has statistics: yes battery present: yes rechargeable: yes state: fully-charged warning-level: none energy: 46.86 Wh energy-empty: 0 Wh energy-full: 49.34 Wh energy-full-design: 57 Wh energy-rate: 0.00501789 W voltage: 12.607 V percentage: 94% capacity: 86.5614% technology: lithium-polymer icon-name: 'battery-full-charged-symbolic'
- Check the lines that read
energy-full-design
andenergy-full
. Ideally these should not be too different. If you see theenergy-full
value is less than 60% of theenergy-full-design
value, then there is a good possibility that the battery is on in need of replacement soon.
Note: Some batteries will do the math for you by offering acapacity
value.
As batteries age they are less able to provide a consistent voltage. Some batteries can gracefully decline, allowing an OS to warn people that they're about to lose power. Some batteries simply give up.