Do you just have the one battery? I'd be curious to see if all batteries fit like this. I have not experienced this but I have observed that the batteries do seem to be a very tight fit. I have one battery that is very difficult to remove.
My P4P has the same slight gap. I have another battery arriving tomorrow so will be interesting to see it's the same. Not that I think it matters, it's not going anywhere.
Just give it some time. The more you use it, the sooner it will loosen up.how do you go about making the p4p battery come out easier/
the one I had was a real bear to get out.
thx D