Interesting development on the battery front
Back in 2017 I bought a 7D which was about 18 months old, little used. It came with three batteries – original Canon plus 2 no-brand.
The no-brands didn't hold their charge for long, so on the advice of a pro colleague – who owns "dozens" of LP-E6 packs for still and video kit – bought a couple of red Baxxtar 2040mAh packs from Amazon.
They immediately registered in the camera, and lasted much longer than the original.
In the last few days I've traded up to a 70D – again, a second-user model with very little use [only 5,600 clicks]. Higher res images, vari-angle touch screen, easier to use.
BUT the battery reg system does not seem to like my Baxxtars. I put one of them in for a first test shoot, worked fine.
Then today I remembered about registering the battery. The number showed up and registered as a new pack. So I thought "while I've got the camera on my desk, I might as well register the second Baxxtar and the Canon that came with the 70D.
That's when the fun started. Insert the Canon, go to register, and the number showing is the number from the Baxxtar. Another number is showing greyed out, which I'm guessing is the Canon number. But it won't light up to register.
Try the second Baxtarx. Same thing - first number only shows up, another is greyed out.
After more fiddling, I can delete the "rogue" number and then register the apparently correct one. But then when I swap over, that number persists so the problem perpetuates.
Obviously I can ID the Canon, and fortunately I've labelled the red ones, otherwise I couldn't keep track.
Any suggestions? Is this – as previous posters have suggested – some sort of Canon "chemistry" update??
Ken W in Caen.