Patches and discussion for Ensoniq VFX family

This VFX is really a strange beast !
Following this "low battery" warning, I opened up the hood to take a 
look at the battery type and the way to replace it.
First of all, the analog tests showed (Preset+Compare): REF: 70, BAT: 
115. Date on the synth: Aug 1990.
While trying to identify the battery type and the way it is soldered, 
I discovered the battery holders were loose and it broke quickly 
after I just touched it...
Now the best part: as a temporarily solution, I put the same 
battery&holders back in place making sure the contacts were OK and 
taped the whole thing so it won't move... and it works ! Analog tests 
shows: REF: 90 and BAT: 223 !!! Played with it last night for 3 
hours, the random-pitching on sounds never appeared !

I'm going to replace the battery and resolder the battery holders to 
the board.
Question: The battery looks exactly the same as the ones used in 
photo cameras (3V, Lithium. There is also a strange "BR 2/3A" 
reference on it too). My guess is to use this type of battery. Any 
recommendations ??

Thanks in advance !

Fred