
Patona Battery handle for Nikon D850
Battery grip
Patona Battery handle for Nikon D850
Battery grip
This is due to the crappy cheap battery grip. I am sure that this would not happen with an original Nikon battery grip and original batteries.
I cannot answer this question. But I would not buy this product again: It already broke after 3 months on one of the small threads (for attaching the battery unit). I will buy the original Nikon battery grip and throw away the Patona product (109 francs in the bucket)!