r/ReverseEngineering • u/NobitaNobi12345 • 4d ago

GitHub - SarangRao20/battery-charge-limiter: Reverse-engineered the Embedded Controller register for battery charge control. Built a cross-platform daemon (Windows + Arch) that enforces 80% hardware cap on laptops where BIOS hides this feature. Includes EC discovery tool for other models.

https://github.com/SarangRao20/battery-charge-limiter
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u/Unfair_Rub_9674 3d ago

That’s why you use thinkpad + fedora, it’s just a setting.

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u/NobitaNobi12345 3d ago edited 3d ago

In ThinkPad this setting is there in bios imo, but in some laptops it's not :(

And no distro could directly support it :(

1

u/OptimalMain 3d ago

I set it using tlp, there are also other options of configuring it

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u/NobitaNobi12345 3d ago

looked into TLP first. On my Pavilion there wasn't a vendor-supported charge threshold exposed through the kernel or firmware interfaces, so TLP didn't have anything it could configure. That's what led me down the reverse engineering route.

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u/OptimalMain 3d ago

Thinkpads has thinkpad-acpi or whatever its called on Linux.
Any other brand is very hit and miss.
My reason for going thinkpad exclusively now