Its definitely supposed to be bigger than the default battery but I checked videos online, it is supposed to snap into place just like the old battery. Extended batteries fit the same space but stick out farther so you need to use the provided case.
This battery DOES NOT line up with the phone along the bottom edge. It just doesn't. From Youtube videos, the batteries other people have line up and snap in. Because it doesn't actually fit into the battery slot, I can't even use the provided case.
It is very messed up and I'm just in disbelief because I can't find any record of any other person online with the same problem.