SonyNP-FW50 Lithium-Ion 1020mAh Rechargeable Battery

Great batteries. Loved that they are OEM so I bought 2 more. Just wish they weren't so expensive. They fit my A6400 perfectly and now I cant tell which was the original.

Works great! Good battery.

Took forever to charge but it's doing well so far. I think it will hold up better than the cheaper options.

First and foremost, I used to work for "Sony Seattle Premium Outlet" before it leases was bought out by Ambercombie & Fitch. I work there for two years, I was in charge of the camera department hence I know everything about still camera batteries and video batteries for every make and model of camera.This battery is 100% the real deal.Its the same as the old Japanese built W series battery but now made in China. The reason for this is the battery used to cost $80.00 but the switch to a Chinese manufacturing shaves off $20.00. Also, the technology has vastly improved in the past few years thanks to the switch to a more uniform slightly slimmer design and YES this battery will work with your old W series charger that came with your camera.MOST importantly, take the battery out of the package and give it a complete full charge BEFORE you use it in a camera. Doing this will help to set the internal InfoChip to give you an accurate percentage reading of your battery power level.As for other Sony batteries out there. How to find an exact replacement for your old battery is simple. Etched or Printed onto the battery itself is a letter this indicates what battery is compatible with your product.For Example:W - Most Older Sony Still Cameras Nex and Alpha SeriesZ - Is the grandson and replacement for the W series battery, (WILL NOT WORK WITH OLDER CAMERAS THAT USE W BATTERIES)V - Is the uninformed standard for ALL Video Cameras (However the L series exist, but that's mainly used as replacements for OLD Handycams and external recording devices)M - Is used for large body full frame still cameras and broadcast field monitors.I hope this guide has been useful in helping clear up the confusion, on the legitimacy of this product.

What else can I say but that it's a good battery even after a year of use.

9/23/12, revised from 1- to 4-star rating (should probably be only 3.5 to be nitpicking about it). From somewhere in Europe. I have now used both (original that came with the NEX-7 and the one from Amazon marketplace. I started out with using the Amazon unit. After like half the afternoon, the battery went kaput! I switched in the other one, and it seemed to fair much better, tho at the end of the day, it'd still be (almost) run. However, on using the original equipment unit, I paid much closer attention to usage, etc. I then noticed somehow that "perhaps" with the camera bouncing in my lap (hung from shoulder), I seemed to notice the LED display screen was on much more of the time. I then started to hold it, with it facing down, and it seemed to fare much better. Just a coincidence perhaps. Perhaps because of the bouncing, somehow the eye-level viewfinder was activated???? causing the drainage???? I did the same with the Amazon unit, and it seemed to do much, much better, tho not quite as close to that of the original, but perhaps both acceptable.Then, I started to notice that somehow it was in I think "VIDEO" mode, and a running clock was on display . I had to shut off the camera, turn it back on, the check I think the shooting mode, and got it back to SINGLE SHOT mode. I was clueless how that got triggered. It happened on this Europe swing (so far a week now) about 4 times now. I will have to talk to Sony, see what triggered it. I am clueless as to how it came about. PERHAPS that's why the battery got drained?????? I'm sure I will even update this mystery later. All digital point-and-shooters are power-hungry because of the LED screen, etc. So, one'd better have a backup for a full-day shooting session. I'd like to have a battery that would last me like 8 hrs. a day, but.... this ain't the case. Considering the situation, I revised the star rating as such.-------------------------------------------------------------------------------------------------------------------Early Sept., 2-12. The more I researched, I decided on a genuine Sony battery for my new NEX-7. So I purchased 1 thru Amazon, of course. It looked good, except that I noticed the label at the back is not quite 100% as the one that came with the camera, slightly different. Anyhow, I am in Europe now, really field-testing both units. Last couple of days, I would start out with both batteries fully charged up. Each time, both batteries ran out on me after 2-3 hours on the street. It was never that I shot continuously. I'd shoot a few shots, then walk, then a few more. The screen would just go out after a little while. I checked, there's a 10 second after-shot review delay before it'd go out.... Mostly I walked around with it without turning it off; and, because it's a new toy, I was playing around with the menu setting here and there, playing with Scene/Mode/Aperture/Speed etc. Just today (9/14), I went on THE Royal Way around Warsaw, the best part of town. 4-5 hours later I think, one expired about 2 hrs. later, so I put the other in; 3-4 (altogether) hrs. later I think, both were dead. I would say for the last 2 outings, I couldn't have shot more than 30-40 shots total each day/time, with only a couple using the HDR mode (if that matters much at all), other than those, they're just point-and-shoot situations. Am I not using the battery correctly? Or is the NEX-7 really drains that badly? Anyone care to comment (on how to be scroogey and save juice), I'd appreciate. Otherwise, on a single day's outing, I'd need at least 3 batteries. That's RIDICULOUS I'd say. Since the new one purchased here from Amazon gives me similar usage, I wonder if it would warrant sending it back. I will pay closer attention in the next couple of days about usage, to see how bad it really is before deciding.

There is no argument on the longevity of a Sony vs cheap battery. If I have learned anything in my years, don't buy cheap stuff. My original Sony battery for my A6000 is still gong strong, but the LAST (#5, I write the number on them to rotate thru in usage) of the cheap batteries will no longer hold a charge. #4 is on the way out, and #2&3 are slowly catching up.Please, you spent all this money on a good camera, buy a good battery.Thanks.

Tried the cheaper aftermarket and have to say I would pay more for OEM battery. the cheaper ones don't last as long and you'll end up carrying two or three aftermarket batteries while you can invest the same money for one OEM battery