I'm new to this board, which I found via a Google search on trying to figure out how to change the battery on this watch. I have one of these Casio J-51w watches that I haven't used for a long time. I'm trying to change the battery. I popped open the back, but there's a silver metal cover clasp that I can't figure out how to release, which holds the battery in place. I can't remove the battery without figuring out how to open that silver metal clasp. I tried lifting it, but there's a trick to it that I can't figure out. I can't find the manual for module 208 and a Google search, Youtube search, and a search of Watchuseek, doesn't give any answers. Any ideas/suggestions?
Thank you in advance.