Battery disconnects and needs a paper patch

Hi there, my friend has a fairphone2 but had lots of problems with rebooting because the battery came loose. He had to change SIMs often since he travels a lot. He added a piece of paper between the case and the battery, and that helped a bit, but after a while, this proved difficult, since he often took off the case of the phone (sim changing).
I have the old-style case but i had no problems with the battery; however, I don’t open it that often.
Do you know if the new-style cases have a tighter fit?

A post was merged into an existing topic: FP2 reboots on mechanical pressure