Because we have mixed batteries and drills, this could be useful


Bosch/Ryobi battery adapter

588 votes and 28 comments so far on Reddit


In case someone wants to have a hand at it:

Some extra materials required for assembly:

3 x M4 screws (20mm and cut to length)
3 x M4 nuts
2 x 1mm Brass shim 12.5mmx68mm (you could probably use a piece of 0.8mm copper clad for this instead)
A coil spring approx. 8mm dia and approx 70mm in length. A shorter spring can be used, see below
Two short pieces of 7-8mm rod to make up the total length if your spring is < 70mm
Some more 1mm brasss for the Ryobi adapter contacts