Monday, 8 July 2019

windows - Removing support for Lenovo's Battery Safeguard "feature"

Lenovo laptops now include a Battery Safeguard "feature" that disallows use of third-party batteries in models made after May 2012 or so.


It appears this "feature" is provided by a Windows driver as a particular Lenovo laptop in question will:



  • stay powered in Windows on AC

  • stay powered in Windows on the original battery

  • shut down instantly in Windows on the replacement third-party battery

  • stay powered in Linux on AC

  • stay powered in Linux on the original battery

  • stay powered in Linux on the replacement third-party battery


It's interesting to note that if running on the third-party battery, Windows only shuts down after logging in and the user utilities have loaded. Which makes me think it's a driver or userspace application implementing this "feature", not hardware.


What driver or program do I need to disable to remove support for Battery Safeguard?

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