It's a New Nikon Factory battery and it works exactly as advertised. I always prefer factory batteries because the camera warranty still applies if there is a problem caused by the factory battery. This is not the case with a third party battery. You could easily ruin a four hundred dollar camera because you saved five dollars and be left with no warranty coverage. I highly recommend Nikon batteries. Nikon EN-EL14 Rechargeable Li-Ion Battery for Nikon D3100 DSLR, D5100 DSLR, and P7000 Digital Cameras (Retail Package)
When I received this battery. It did not say "Nikon". I believe this to be false advertisement unless I missed some fine print. The only print on the battery is: "Lithium Ion BATTERY PACK for EN-EL14 7.4V 1050mAh" on one side and Made in China on the other. It has the same shape as my Nikon D3100 DSLR battery that came with my camera, but my original battery says 7.4V 1030mAh 7.7Wh. When I put the battery in the camera it said, "! This battery cannot be used. Choose battery designated for use in this camera." Not Happy to Have to Return This Item. BEWARE!!!
So I had to write this review after receiving this item just yesterday. Mostly in response to the 3 one star reviews that claim this item is not a Nikon item and is an aftermarket bettery instead. I'm not sure why if you did order this item you got an aftermarket item because the one I had delivered yesterday is in fact a Nikon brand and came in the official Nikon Package and was made in Japan and not China as the one review stated. So if you are looking for this battery for your Nikon camera rest easy you will get an official replacement and not some knock off.
I bought this as a spare for my D3100. In order to get the best battery life out of it, you need to go through a few charge-discharge cycles to condition it properly; when it starts getting low, use the Live View or flash to wear it down all the way before recharging. Usually when a battery charger light stops blinking, it indicates the battery has 85+ percent charge; keep it on the charger for another hour or so to give it a full charge. Also, using the Live View mode along with the pop-up flash will drain your battery quickly, so try using the View finder and get yourself a speedlight flash. I've used this for 9-10 hours before running low enough to change to my spare. Oh, and change your camera settings so the Auto Off Timers don't stay on long. You'll get plenty of juice out of this battery if you use it right.
For long trips, an extra battery is almost a necessary. There's really not much to say about a battery.......these work great for my Nikon D3100. So far I've been getting about 600-650 shots (mostly without a flash) per charge. Works great!
As per expectations, the Nikon battery is a work of art and a cut above others I have tried. Exceptional battery life (literally hundreds of high res pics.) Reasonably quick recharge, compact. I have tried off-brand batteries in my other digital (a Sony) and had to send them back. I'm very satisfied with this purchase.'
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