If only I could get my hands on some more LP-E6P as I only have the one that was inside the box. The guys at Calumet didn't get why I am aggravated because of this mess, as I could "still use the old batteries". Yes, of course, but they fail to see that I can't use one of the main killer features of the Mark II with them - Pre-Capture. Idiots. Both at Canon and at Calumet.
And by the way: I used to use Patona Platinum Batteries in my R5 and R6 - excellent third-party options for a good price in my opinion. They would power my R5 Mark II - but only for a split second, then the camera would show Error 88 for some bizarre reason. This kind of behavior should be illegal, blocking commodity batteries out my system. I honestly think that this is an outrage.
Does only Canon do this by the way? I've never had an issue with my 5D Mark II back in the day, even my company's 5D Mark IV was fine with third-party batteries. And the Patona ones used to work splendidly as I mentioned before.