DSTE® EN-EL4A Rechargeable Li-ion Battery for Nikon D2Z D2H D2Hs D2X D2Xs D3 D3S D3X F6 Battery Grip as EN-EL4 ENEL4 ENEL4A

My aged EN-EL4a batts were losing their ability to hold a charge but still worked, so I found this replacement and the price was worth a test. So far, with only about 5 recharge cycles on each, they're working very well and holding a charge for 500-700+ shots in the D3 and plenty of photo reviews on the camera (chimping and triage). It only took a slight wiggle to insert the first time but they've clicked onto the cover plate fine and slide all the way in without forcing. I've charged them on the Nikon 1 and 2 battery chargers with no apparent difference from the Nikon batteries. I just returned from a photo trip that included some 3300 shots with these 2 and even at low charge levels I still got my "last" shot before swapping.

I needed a new battery for my old Nikon D3 camera. This product the EN-3L4 rechargeable Li-ion battery gave my camera life again. If you need a new battery suggest you consider purchasing it from DSTE. They immediately shipped it to me.

I received two of these yesterday. Before using them I placed them in my two Nikon chargers, models MH-21 and MH-22 and ran the calibrate function. Both completed the calibration normally and when I placed them in the two cameras they both showed "New" in the <Battery Info> screen. This result is no different from the OEM batteries I replaced when they were new.Time will tell how long they last. I bought a non-OEM replacement a few years ago to have a spare and it didn't last long. I ended up throwing it away. Not this brand though.FYI my cameras are a Nikon D2x and a D3. These batteries fit fine in both cameras and both cameras seem to function properly. I did have trouble on my first attempt to insert the battery into the D3. It went in most of the way but stopped short by about 3/8 of an inch after hitting something solid. Having read other reviews here on Amazon in which other D3 owners couldn't get the batteries inserted all the way in their cameras I thought I was going to be writing a similar review. But when I investigated further to see what could be different from the OEM battery I discovered that, for some reason, it is possible (even likely) that the camera-specific end cap didn't get attached properly. That was the case for my D3. The end cap has a tab that extends toward the underside of the battery and clips on a short post on the battery. Unless you hold that tab close to the batter when you attach the end cap, it will ride up over the post instead of clipping around it. The end cap can still be attached, but when you try to insert the battery into the camera, it won't insert fully. I never had that happen when placing end caps on the OEM batteries But since they can be attached properly with only a little care I'm not going to mark them down for that. I had the same issue with the D2x battery cap. So if you can't insert the battery into your Nikon camera, check that tab. You might not have installed the end cap properly.

I bought this because of the low price--Genuine Nikon batteries seemed ridiculously high-priced. The thing charged normally ok, but it wouldn't hold a charge more than about five days whether is was being used or not. I finally found a genuine Nikon (at least it appears to be legit) at a decent value. So far--so good, but it'll probably be a few more weeks before I can finish running it through the paces. Guess you DO get what you pay for--in the long run....

FYI my cameras are a Nikon D3. These batteries fit fine in both cameras and both cameras seem to function properly. I did have trouble on my first attempt to insert the battery into the D3. It went in most of the way but stopped short by about 3/8 of an inch after hitting something solid. Having read other reviews here on Amazon in which other D3 owners couldn't get the batteries inserted all the way in their cameras I thought I was going to be writing a similar review. But when I investigated further to see what could be different from the OEM battery I discovered that, for some reason, it is possible (even likely) that the camera-specific end cap didn't get attached properly. That was the case for my D3. The end cap has a tab that extends toward the underside of the battery and clips on a short post on the battery. Unless you hold that tab close to the batter when you attach the end cap, it will ride up over the post instead of clipping around it. The end cap can still be attached, but when you try to insert the battery into the camera, it won't insert fully. I never had that happen when placing end caps on the OEM batteries But since they can be attached properly with only a little care I'm not going to mark them down for that. I had the same issue with the D2x battery cap. So if you can't insert the battery into your Nikon camera, check that tab. You might not have installed the end cap properly.

One month in and no problems.