4 cells, would give approx 6V. That would be too much for this mod. You could add a dummy cell in the sleeve……
Here is one way to make a dummy. There are many other ways, but this should give you an idea
How to make a dummy cell in 9 pics
4 cells, would give approx 6V. That would be too much for this mod. You could add a dummy cell in the sleeve……
Here is one way to make a dummy. There are many other ways, but this should give you an idea
How to make a dummy cell in 9 pics