Excerpt: Two very essential features for wildlife photographers: The number of exposures-per- battery charge, and increased number-of-frames per second. The MB-D12 battery, with it's big EN-EL18 battery gives me 3000 exposures per charge. It also holds a second battery, and now I can't even count the number of total exposures per charge. Increased frames-per-second? I got that, too. In the fields & forests, distances from electricity for recharging batteries, problem solved.
Excerpt: Perfect for my new D810. Adds additional battery power and portrait shooting capability. Only draw back is the cost and the cost of EN-EL 18 batteries and charger. Yikes, by the time you're done with getting them you're over $. I got the same set up for my D800 with an off brand for $ and it worked just as well except the camera wouldn't register the grip battery percentage. Fortunately got a $ gift Cert that cut the cost.
Excerpt: It's nice to have two batteries for use when you are going to do a lot of shooting. The construction is excellent and easy to assemble. However, the overall engineering design is flawed. Unlike the battery grips in the Canon higher end DSLRs, where there are two batteries in the grip and power is drawn equally from both batteries, and where removal for recharging is straightforward...such is NOT the case with this battery grip from Nikon.
Excerpt: I hate using "ungripped" cameras, which leave fingers dangling from the bottom. This provides the "missing" part of the D810 body, gives you controls for vertical format shooting, and allows the use of the superior EN-EL18a batteries.
Excerpt: I just ordered my D810 in replacement of a D600 witch had a battery grip too. I ordered from B&H because they had the original Nikon model. I do not want to deal with imitations. The item arrived quickly and it works perfectly as expected.
Excerpt: This is the alloy metal Nikon version. While the other plastic ones may work, I was concerned when using on a tripod and the pressure on the socket. I wanted the real thing. Although I understand the construction may cost more I believe Nikon has priced this rather high.