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Comment by microtonal | Hacker News Reader

I had the same issue with the ThinkPad T14 AMD. Left it in my backpack for two days and the battery was completely drained.

What made it worse: Lenovo's own USB-C Gen 2 Dock would refuse to charge the battery when it was drained. I had to borrow a friend's MacBook Pro USB-C charger to get the battery up to a reasonable charge.

(Yes, the dock does provide enough power for charging the laptop.)

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TBH my Macbook Pro does the same, really annoying when going on holidays and not using a laptop for few days.

That seems like an issue with your MacBook Pro? I have used MacBooks since 2007 and I never noticed such issues (unless there is a process blocking sleep). With the T14 I immediately noticed it, with the same usage patterns as I had with the MacBook.

Sounds like the issues from X1 Carbon 6th gen where the only available standby was always-on-standby (Windows-only thing): some patching of ACPI tables has helped with that, though Lenovo has since updated the BIOS and restored the usual S3 standby. 7th gen worked out of the box, but I am not sure if that matches t490 or t14 generation (or maybe even t480).

The biggest worry for me is putting it in a backpack and the battery causing a fire.

> though Lenovo has since updated the BIOS and restored the usual S3 standby

This drain with the T14 was with regular S3 sleep (sleep mode option changed from Windows to Linux in the firmware setup).

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