I do have a spot welder, and as far as welding to the cells themselves- yes, that's the way to go. Unless you have a very powerful spot welder, using the original nickel strips is very difficult... plus they tend to get all mangled when you pull them off the old cells, so it's a good idea to get a ...

However, I’ve heard that for retro ThinkPads (e.g., the 200, 500, and 700 series), the battery management system is relatively simple. Can you just replace the cells directly and use the battery without any special procedure? Specifically, for a ThinkPad 240, would it be safe and straightforward to...

Just curious, I have a couple 760 series li-ion batteries and want to swap the cells in one but have been worried about the “suicide” BMS chips in that era. I noticed that the Thinkpad battery utility can do a discharge/recharge cycle which I assume is intended for Ni-Mh batteries, though I am able...

I recently purchased a second-hand ThinkPad 240 with a dead battery, and I’m planning to replace the cells myself. I know that some relatively modern ThinkPads (e.g., X61, T61) have a Battery Management System (BMS) to manage the battery. In those cases, if you want to replace the cells, you usually...