DealExtreme Knockoff(?) Tokyoflash Shinshoku (Corrosion) Battery Replacement

The case back fits hilariously tight, and the little rebate made for getting a screwdriver in to pry the back off was obstructed. I wound up chewing up the case a bit, but this isn't going to be visible while wearing the watch, and it doesn't affect the case gasket. Sheeeez.