My first board from FW was an i7 1165. I personally didn’t find the battery life to be great on the 11th gen board; it was better on Windows than Linux, however. Overall I was frustrated enough with the battery life that I upgraded in about a year to an AMD 7840U. Although still not stellar, it was an improvement. Performance was otherwise up to par, and I didn’t find anything the board couldn’t handle.
Battery life has always been a bit of a sore spot on FW’s from what I’ve managed to gather. If you want to run it with Linux, definitely try to couple it with Auto-CPUFreq or another power management option.
I started out with the i7 11th gen, it was a solid experience for whatever I threw at it. 4c8ts up to over 4ghz isn’t suddenly useless just because it is a few years older. Keep it cool, and you’ll even get some decent lightweight gaming in on a day off.
Things to keep note of:
the 11th gen suffers from an RTC battery drain problem, not an issue if you actually use the machine every day, and charge it at least once a week or so.
The different expansion cards draw more or less power than one another, the USB-C uses the least, the HDMI (?) uses the most.
Different NVME drives use more or less power.
Your quest for longer battery life will probably lead to the 61wh battery, but I will note that with a “standard” university style use case: note taking, text entry, an IDE or text editor running… You’ll probably still get most of the way through the day on a charge. If you start adding in video, I’d keep one of those small GaN chargers on hand and top off from time to time. (There is a nice anker unit that is 100 watts that will charge a little quicker, and YMMV, but you can trickle charge with a 5v supply as well in a pinch).