I don’t know how long this wallet will stick on my silicone battery case...but what I wanted for my Max was a battery case with a wallet and something like an iRing or pop socket. If this works I might might get another wallet and use it with an iRing as I slightly prefer the iRing over the pop socket. Anyway...I know everyone will think this looks ridiculous...but I am loving it. The wallet slides off to allow wireless charging and it fits in my jean back pocket! Let’s hope it continues to stick! Historically pop socket products haven’t stayed on apple silicone cases and the wallet is from pop socket.