Battery icon (and everything related to battery) missing, upower solutions not working

After a recent update (and more probable after trying a few battery Gnome extensions) I lost my battery icon in the tray and found that actually I have nothing related to my battery in settings, tweaks, etc. So, looks like I have no battery on my laptop although it works enough time unplugged!

I tried reinstalling gnome-power-manager, I tried restarting upower, I even tried fdpowermon, and I tried every kind of solutions offered here (and everywhere).

So, I use 22.10, Gnome 43.1 on a Dell Inspiron 7348 laptop (with bios updated) and this is what I get:

$ acpi
No support for device type: power_supply

continue:

$ upower -e
/org/freedesktop/UPower/devices/DisplayDevice

And it doesn't show anything like a Device: org/freedesktop/UPower/devices/line_power_AC0 or Device: /org/freedesktop/UPower/devices/battery_BAT0

So:

$ upower -d
Device: /org/freedesktop/UPower/devices/DisplayDevice
  power supply:         no
  updated:              Sat 04 Mar 2023 03:13:31 AM +0330 (1491 seconds ago)
  has history:          no
  has statistics:       no
  unknown
    warning-level:       none
    percentage:          0%
    icon-name:          'battery-missing-symbolic'

Daemon:
  daemon-version:  0.99.20
  on-battery:      no
  lid-is-closed:   no
  lid-is-present:  no
  critical-action: HybridSleep

I even installed and tried the other option:

$ fdpowermon
No support for device type: power_supply

By the way, my battery is working well but I can't see how charged is it, (and anyway I like my battery icon icon up there), So how can I get it back?

You might have disabled the power icon. It can be enabled using the extension Just Perfection. I usually use extension manager to install and manage extensions in my device. Can be installed by;

sudo apt update && sudo apt install gnome-shell-extension-manager

If you're using Extension Manager to handle extensions, Open the software and follow the steps:

1. Under the section installed of Extension Manager. You can search for Just Perfection.

2. If it is not enabled, enable it. Click on the gear icon near the enable button and a popup will open up with the extension settings.

3. Under the icon section enable Power Icon if it is disabled and you should get your power icon back.

• If Just Perfection is not installed, you can install it from the browse menu and follow the above steps

If that doesn't work try gnome-shell --replace in Terminal.

I don't know when, how , and why there was an "acpi=off" added to my grub :-| That was it. I just replaced it with "acpi=force" (yes, I insisted to do it), so the lovely battery icon is back up there.