Looking to rip save files before I replace battery then flash save file back to it

[/classicSNESmini]

Hey everyone! I have a second hand copy of FFII and I checked the battery voltage and it’s getting low (2.42v). So I bought 10 batteries because I tested a couple other batteries and they are getting low. With all the time I’ve put into these games like Earthbound and Chrono Trigger I want to swap the batteries so I don’t have a “WHAT THE F#%Â¥!â€￾ moment when I go to play one and my save battery is too weak to load my save. I would also like to find one for NES games.
I have one from bennvenn that works great for my Gameboy/GBC games. I didn’t check his site for one yet but I figured I’d ask you guys first.
I would even get the schematic off GitHub and build one if I have to. I have all the chip programmers and stuff but I’d much rather avoid doing that if I can. I’m sure someone has made one that can do one of not both considering there’s multiple for Gameboy.
Thanks guys!
-Mike

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