Hi all, I have a Mamiya 645 afd, but the battery compartment broke so I purchased a used one. The used one has corrosion that I'll be able to clean and use. Plus the need for foil to make the contact (don't ask) and the latch is broken also, which needs effort to close. In my quest to find a battery holder I saw that Phase One has a lithium battery pack for their DF and +DF models. They look like they'll fit. Has anyone tried this? I would like to use this setup if it's workable. The battery cost $100 USD and the charger is another $125 USD. Pricey, but if it works... Before anyone suggests getting the external battery pack, I have one. I just want something more portable.