BOSCH PSR 9.6V Replacement Battery didn't fit in VES-2. The nipples of the replacement battery shown in the green circles are not at the same position than the nipples at the original battery pack. So the replacement pack didn't fit in the screwdriver. You can cut these nipples carefully with a cutter knive to get the pack fit into the screwdriver.

 

BOSCH 9.6V Replacement Battery [left]

BOSCH 9.6V Battery [left]

BOSCH 9.6V Replacement Battery [left]

BOSCH 9.6V Replacement Battery [left] 

BOSCH 9.6V Replacement Battery [right]

BOSCH 9.6V Battery [right]

BOSCH 9.6V Replacement Battery [right]

BOSCH 9.6V Replacement Battery [right]