2018-04-05 by raltoja@...
I did a google search on several variations of "Casio RAM card battery replacement." but I got zero useful information on it. The most useful information I can give you is to turn the card face down and use small pliers to pull on the smooth section at the top of the card to the right of the notched section. This worked for 5 of my 6 RA-500 ram cards without problem. The 6th card was the one card this advice did not work for, It simply did not budge. I did file on the side of the card closest to the battery compartment and I would have continued until I had direct access to one of the hooks so I could disengage it. But I did not actually have to breach the side of the card as the battery compartment finally came loose after my 15th pull on the tab. I am saying that filing the card probably just gave me something to do between tugs on the card compartment tab. (What I did learn was that if you file away enough plastic from the side of the card, you end up with a metal strip still blocking your way to access the inside of the card. That strip can probably be pulled back or broken off bit by bit but in my case it wasn't necessary to do it),
I have never had any problems with any of my cards for Korg, Yamaha or Roland since the engineers had the profound insight that the user might eventually want to replace the battery. I haven't tried to open any of my cartridges yet except for my Casio RA-6 cartridges for the CZ1 which are held together by 3 tiny screws. So tiny that they strip easily but it is possible to remove them if you are extremely careful and use the exact jewelers screwdriver required. I guess I will eventually have to figure out how to open my Yamaha, Roland and Prophet VS cartridges. There is some info and pictures on a website on how to open Yamaha RAM4 cartridges and about lots of regular Korg, Roland and Yahama soundcards. I will see if I can find it again and give you the web address in my next post.