Some of my Dualsense 4 controllers that I have from when I first bought it ~5 years ago no longer hold a charge for more than about 15 min. I initially looked to see if someone could replace them, but found a YT video showing how to do it instead.
I had no idea they sold basically a complete kit and I ordered one based on that video. It took about 15 min to replace and was both straightforward and easy to do. I had no idea the original versions of these controllers had such small batteries, mine are 1500 mAh. The replacement batteries are obviously 5 years newer, but they are smaller and the ones I got have significantly higher rating at 4000 mAh. No issues with the first one so far, so I am going to do the second one.
