I would recommend a newer model of the Thinkpad T line up since they have hot-swapable rear batteries or the lastest Thinkpad A line up since they also look lik

I would recommend a newer model of the Thinkpad T line up since they have hot-swapable rear batteries or the lastest Thinkpad A line up since they also look like they have hot-swappable rear batteries while having at lots of cores and threads