Agree ! but if he is watching he should get a battery complete with a charger.No getting around that fact!
The picture of the OP's battery makes it look like it might be a little easier to figure out - IF he's even interested in doing that.
To be honest, with just 3v showing on a volt meter, I'm not real sure it's even worth messing with.
BTW did I tell you I modded my controller and got 32 amps out of a 22 peak?
It actually was only putting out 18 peak ! Now I can reduce current thru the display to get whatever amps I want under 32.