Yamaha Mu80, replacing the battery and adding a socket.

The battery low warning has been coming up for a while and as I indicate I was worried that perhaps the battery might leak if I left it. I find that the idea that I should video what I do and that I need to keep on making them helps me get jobs done. So if nothing else UA-cam helps with my procrastination problem. That old battery lasted maybe 27 years, seems amazing.

[@Sound1962]

Thank you very much for this Information - sitting in Germany and just revived my mu80 to play old midi compositions ... I bought it because it aditionally has 2 analog mic/guit Input channels to add effects. I controlled it by Steinberg Cubase 3.x Score Software that still runs on a Win 2000 Computer. Yamaha recommends "authorized Yamaha Personel" for this, but i am shure they dont do it for an aceptable price. First I thought to keep a new 3 Volt parallel to enshure storage data but anyway I had most of the data sent by the midi file SysEx thing.
Still thinking about this. I might just cut out the old battery and leave the socket in, just solder the new battery in place? Just find out what type is wicht 24 mm diameter.