(Disclosure, I may receive a small referral fee when you make a purchase through this links on this post.)
One of the complaints I have heard is how hard it is to open the battery cover on the Fire TV Stick Remote. I did a video on how it can be opened. Please note that I have already opened it during my unboxing video so it is a bit conditioned. I did have trouble when I first opened it but as you can see now, I can open it with one hand (thumb).