[Switch] Battery level not displayed in top menu bar when discharging

Is there an existing issue for this?

• This is a bug in RetroArch frontend
• I have searched the existing issues

Description

On Nintendo Switch, for some reason, the console's battery level is only displayed at the top menu bar (next to the date and time) when the console is charging. When the console is not charging, the battery display is gone completely, even if the "Show Battery Level" setting is enabled.

The correct battery level is always calculated and shown in System Information, the issue just impacts how it is displayed in menus. All four menu drivers (ozone, rgui, xmb, and glui) are affected.

Expected behavior

The battery level should be displayed at all times.

Steps to reproduce the bug

1. Open RetroArch while the console is not charging.
2. See that the battery level is not displayed.
3. Plug in the console to a power source and wait a minute.
4. See that the battery level is displayed now.
5. Unplug the console, wait, and see that the battery level is gone again.

Version/Commit

1.22.2 (nightly 2025-12-22)

Bisect Results

No response

Present in the nightly version

Yes, this is reproduced in the nightly build

Platform & operating system

Nintendo Switch (Horizon OS 21.1.0)

Affected Cores

No response

Environment information

Atmosphere 1.10.1
emuMMC

Relevant log output

Reproduce the issue on Nintendo Switch while charging and discharging, with “Show Battery Level” enabled. Inspect how battery information is displayed in the ozone, rgui, xmb, and glui menu drivers, using System Information as the known-working comparison. Done means the battery level remains visible in the top menu bar while discharging in all four drivers.