No, I just buy a new lenovo 9 cell battery. I use my X200T for creativity stuff (reading/writing/drawing) and use my T500 for portable more intense work like programming that I would do on the ASUS KMCA-D8 when I’m on the go. I get about 5-12 hours on my X200T and 3-10 hours on my T500, but I do carry a docking station with me, so I can always just recharge easily, but I usually don’t use it since the 5-10 hours is more than enough for school bus rides and I don’t usually program in a place without a charging outlet nearby. Btw it’s important to note that my computer is very minimal since I use parabola open rc edition with dwm to boot emacs, libreoffice draw, and icecat, so if you have a bloated setup then ofcourse the battery life will differ.
Suckles DWM is amazing. No bloat at all. There is only 1 config file, and you edit it with pure C like a gigachad. Like all suckles software, it strictly obeys the Unix philosophy, and it has been the cause of the most lightweight set ups that are also cool hacker-looking