Mamiya 645AFDIII & DF AA Battery Holder frame

Used to power Mamiya 645 AF & AFD & Phase One cameras.
This is the compatibility list i found but confirm with your manual that it's the correct battery holder.
Mamiya 645 AF
Mamiya 645 AFD I , II, & III
Mamiya 645 DF / DF+
Phase One 645 AFD
Phase One DF / DF+

Just a side note, make sure you use the type of AA's it says in the manual. Not every older camera works well with lithium AA

See the Phase One 645 AA battery holder