Working on Acer Nitro 16 (AN16-43-R7N7)

[rmunn]

When I bought this laptop, it came with Windows 11. I partitioned it to dual-boot with Arch Linux. In Windows, I set the health mode in the preinstalled Acer Care Center app, and the battery charged up to 80% and stopped. But in Linux, it was still charging to 100%.

Then I found and installed your kernel module (via the https://aur.archlinux.org/packages/acer-wmi-battery-dkms-git AUR package), and rebooted. A quick check showed that /sys/bus/wmi/drivers/acer-wmi-battery/health_mode was already set to 1, which means that the flag was set by the Windows driver and was being stored somewhere in the laptop hardware (probably in the battery itself). Unsurprisingly, that flag also persisted across reboots. And sure enough, when I plugged in the AC adapter, my battery went up to 79% and then stopped charging.

This works perfectly; thank you.