My controllers are quite old and had a lot of connection problems. They kept turning off mid-game even though I'd just put in a new set of batteries. I thought I would have to buy a new controller but I saw that it would cost around $40 and I didn't want to pay for such a controller. that the problems stopped after replacing the battery covers. I've noticed that the battery covers on my controllers are a bit loose so I decided to try this product as it's pretty cheap. Needless to say I haven't had any issues since I got a replacement. The battery covers are very similar to the old ones and hold in place very well. I'm glad I replaced the caps instead of buying a new controller. This saved me a lot of money.