I have just purchased a Hasselblad 501CM and have dusted off my old Graflite 250 Stobe. Can anyone provide the following:
1. Maker and model of rechargable battery pack.
2. Thoughts on this flash for portraits - pros and cons.

Thanks for your help.

To state the obvious. Until you answer question #1 it's not very good for question #2.

I'm not the expert on Graflex flash units but other models that use HV batteries are to expensive to use. I've seen people selling the schematic for 110v conversion but haven't seen just how difficult it is.