Arthur_Nunes said:
not to say I've never had any issue, when I had just a couple of 622C, they once got crazy and stopped firing when I had to use duracell alkanines on them.
Had to shut'em down for a while and then got some shots before they stop again. I guess there was some voltage/current issues because I always use Ni-Mh batteries and never missed a shot.
obs: the duracells could fire my YN568EXII on full power perfectly with no delayed reclycling so definitely something messes up using some alkalines on 622C
I know this is an old thread, but I just want to say a huge thanks Arthur Nunes for posting this observation!
I was tearing my hair out (which isn't easy, 'cos I'm mostly bald with a very short haircut) over a maddening inconsistency with my YN-622C II transceivers (yes, mark IIs) and my one remaining Canon 430 EXII. It would randomly completely ruin an ETTL shot either by nuking it or by missing sync even with a nice low shutter speed.
After finding this post I swapped the good quality alkalines I had in both YN-622Cs for (partially deplected!) Nimh rechargeables and bingo! Suddenly each shot was correctly exposed and synched.