BIOS guide

[Animesh_Sahu]

@PhilS

What kills laptop batteries fast is having it sit at 100% SoC (~4.2v per cell) for long periods of time, and is exacerbated by higher temperatures (typical inside a laptop). “Disconnecting” a battery will do nothing unless it’s at a lower SoC. I vote for a selectable charge threshold. If you set your SoC to 70-80% you can massively extend the life of the battery. I’ve run 80% on my current Lenovo X1 (6th) and the battery has only experienced a few percent degradation.

You can set thresholds using tlp which forwards the setting to EC of the laptop Battery Charge Thresholds — TLP 1.3.1 documentation (linrunner.de)

START_CHARGE_THRESH_BAT0=75
STOP_CHARGE_THRESH_BAT0=80