> You should see my X62, the battery is so bad. I even bought a "brand new" battery and it last about 2 hours.

That's probably a fake or aged battery, or your power management is set up incorrectly. A X62 with a fresh battery lasts a lot longer than 2 hours.

Where did you buy yours? I bought an old X61 and the battery was crap. I can only find affordable genuine ones on eBay. The ones on Amazon were $200... So it didn't make sense to buy them

I buy 3rd party replacement batteries on Amazon. The original batteries have degraded by now, and replacing the cells is a tricky operation: https://hackaday.io/page/247-replacing-lenovo-laptop-lithium...

It was 4th generation Haswell (4000-series CPUs) that cut power consumption in HALF! In fact Haswell was so awesome Intel didn't make measurably better CPUs until 7th generation(Kaby Lake)!

I have a non-ssd Asus u36sd from 2011 running Windows 7 that still has around 5 hours of battery life with moderate screen brightness, a Jetbrains IDE running alongside a vagrant VM, Firefox, music etc, so I think you should or could do better.

My more recent Macbook pro at work is basically worst though, not sure why.

Even if it was an unused battery it might have been old and degraded. One of the problems with replacing batteries in older devices is that if the battery isn't produced anymore the replacements will not have full capacity either.

Would be awesome for the retro thinkpad scene if someone started making new batteries for the old stuff.

You can just crack open a ThinkPad battery and put in New 18650 cells!

oh? I've tried this before, the battery charge/fuel gauge circuit entered a permanent fault state and none of the tricks I found online worked. It was an x61 battery.

I would love to learn how you did this!

How I failed to rebuild a thinkpad battery?