I have been using a couple of those batteries for about two weeks and they appear to be fully compatible with the MB-D12, MB-D17 and MB-D18 grips. They hold well their charge and allow 9 fps with the Nikon D850. When fully charged, the cameras consistently indicate a charge of about 95%. Although a few charging cycles may correct that problem, I did not observe it with genuine Nikon batteries. Those batteries have been extensively reviewed elsewhere, and they were found to be good replacements of the original, although with a lesser capacity. Cheaper replacements are available, but my experience with them has been negative.
Verified purchase: Yes | Condition: New
Great. Solid build. A bit more $ than others but dependable. I get 100% charge rate when installed then left the camera ON for 48 hours just to brutalize the battery proceeded to do 2 days of shooting before it need recharge. I'd say that's good. Also get 9 fps, smoking fact. I like the charge too. Thanks for a great product.
Verified purchase: No
Works perfectly and gives me 9 fps for a fraction of the price. Now I can have two of these and still save a lot of money.
Verified purchase: Yes | Condition: New
they take my camera to a different performance level. Kastar also redefines customer support
Verified purchase: Yes | Condition: New
Charges quickly, and then holds a charge a long time.
Verified purchase: Yes | Condition: New
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