Greetings,
We don't know yet. Initial reports indicate a firmware update might be needed for older body's to use the new 6P battery. I don't know about the 5D2 getting an update at this point. R52's are starting to make their way into people's hands. You should have an answer fairly soon.
~Rick
Bay Area - CA
~R5 C (1.0.7.1) ~RF Trinity, ~RF 100 Macro, ~RF 100~400, ~RF 100~500, ~RF 200-800 +RF 1.4x TC, BG-R10, 430EX III-RT ~DxO PhotoLab Elite ~DaVinci Resolve ~ImageClass MF644Cdw/MF656Cdw ~Pixel 8 ~CarePaks Are Worth It
