Instruction: Generate an answer to the question by utilizing the information contained in the document.

Input:
Question: How's the quality control?  Some folks say it works in the grip, others say no.  Some say lasts as long as original, others say 1/2 or 1/3
Document: Purchased this battery on a lark, last minute before a video shoot. It arrived the night before the shoot, and gave me the extra assurance of having a backup 4th battery for my 2 nikon D800 cameras.It charged perfectly in the Nikon charger, fit perfectly in the camera, and gave me almost an entire day's worth of film-style video shooting.Can't beat the price, 1/3 price of a genuine Nikon. We'll see how long it lasts.
Quality batteries that hold a charge as long or longer than OEM items for less than 1/2 the price of the name brand.
I bought this in Sept 2013 and used for a few outings. It does not last 1/3 of shots of the Nikon battery. In one occasion the battery dropped 2 bar after 50 shots.I contacted Eforcity for replacement but they said my order was over 30 days and not qualified for replacement. I would not recommend to others for this OEM battery.
I recharged and them 5 times and didn't see any defect. Every charge lasts as long as the original Nikon. I used it on Nikon D600 in video shoot mode. I don't own a grip. Will update the review if anything new.
I put this battery in a grip. D7000 shows the age of the battery but does not show how many pictures it can take. Where at the same time the original Nikon battery that sits in the camera body does show that informaiton.Other than that : cheaper than original and seems to work ok. Time will tell how long it lasts ...
Good battery for the money but only lasts about 1/3 compared to the Nikon OEM.. The Nikon battery is worth the extra money.
Good battery for the money but only lasts about 1/3 compared to the Nikon OEM.. The Nikon battery is worth the extra money.
Don't buy original Nikon batteries. They cost too much and you can get the same great quality from knock offs like this. I bought this battery to go in my vertical grip (also aftermarket) for my Nikon D7100 and works flawlessly. I even tested it inside the actual camera just to make sure and it is great. I havent noticed any loss in power with this battery. It holds a charge just as well as the original battery. And the price is just right
#1: After 4-5 charges, its capacity dropped at least 50%! Very bad quality.#2: The size is little bigger than Nikon OEM battery. When install it, you have to push it in. That is not a big deal. The problem comes when you want to take the battery out. It does not slide out of the camera! You have to knock the camera on some kind of semisoft surface to get the battery out. This is totally unacceptable.
Lasts just as long if not longer than my Nikon battery even in the after market battery grip. Will buy more.
Answer: It's less than 1/3. 15 minutes of video maybe. Never charges more than 70% and the charger indicates a charging error by rapidly blinking the amber light. I absolutely don't recommend this. The seller refunded me promptly.