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Trusting the Thinkpad spec sheet numbers, an AMD T14s lasts >15hrs in one of the benchmarks on a 57Wh battery. That's less than 4W. Perhaps on Linux and with some tuning, it seems plausible to get to 3W?

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Trusting battery estimates? I believe apple claims my m3 mac is capable of 15 hours or so. If I’m lucky I will get like 7 hours with a basic documentation webpage open and the terminal connected to ssh.

Third party reviewers seem to say the M3 mac does pretty well:

https://www.tomsguide.com/news/macbook-pro-m3-and-m3-max-bat...

Maybe yours is a lemon and/or should be replaced?

The estimates appear to match what notebookcheck[0] reports on their measurements - 4.4W idle average. With some tuning[1] and turning off unused peripherals, I expect to go below 4W idle.

[0] https://www.notebookcheck.net/Lenovo-ThinkPad-T14s-G3-AMD-la... [1] https://docs.kernel.org/admin-guide/pm/amd-pstate.html

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