2 Pack NP-F970, NP-F550, NP-F750, NP-F330, NP-F770, NP-F960, NP-F530, NP-F570 KYTD Camera Battery Charger for Sony Cameras (7800mah Battery with LED indicator and Micro-USB Input) Camcorder Battery

I purchased these to run a Swit field monitor, judging by the rated output they should last around 5.2 times longer than oem NP-F550 and around 3.5 times longer than a high output version of the 550, so for me it means carrying less batteries whilst out on a location - hopefully they will prove as reliable as others have said in other reviews, only time will tell. The use of the USB charging system is a very good idea - mine came just over half charged and took about 5 hours to fully charge, so I expect around 12 hours from completely discharged -not bad for such a large Battery via USB. I will try to charge them through a mains charger at sometime to see how long this takes. very satisfied with the product and a very swift delivery via the Amazon courier. ADDENDUM I've just been talking to a chap who has one of these Batteries and was unable to use the Type A output (on the opposite end of the Battery to the charge input) as he was unaware that to use it you have to press the RED BUTTON to switch it on, thus giving you a power source to charge Phones etc. (just a shame these units don't come with any form of instructions to aid the use of this very useful aid) - still 5 star though..

I use a FS700R and various video lights. These batteries work perfectly on all of my equipment and last a long time. I love these.

Great capacity - using to power my bmpcc4k for over 2.5 hours with a 12v battery plate. My only gripe is the battery output can dip under 6v after only an hour when not transforming to 12v. In my case the camera cut out after just 1 hour due to voltage dip, even though the battery had half it’s capacity left.

What I liked about these batteries is that they hold plenty of power and they can be charged without yet another charger! An unexpected bonus was that I can use the USB out port to run my iPad, which I needed to do the other because I had neglected to charge it. I was able to use it while the battery charged the iPad.I have seen criticism of the slow charge time for these batteries, but it has to be remembered that you are charging via USB, so it will take longer. My batteries have charged fully and in the limited time that I have used them so far have been excellent for powering my LED video light.

These batteries are good value but I have an issue on my Atomos Ninja recorder where if you knock the device even a little when powered on it loses power. There is a physical difference in the moulding that is not 100% the same as genuine NPF batteries. I don't have this problem with other NPFs.Also, I charge using the supplied USB leads now which work well but I was not getting a full charge from a 3rd party NPF charger even though the charger was reporting 100% charge. It could be the charger that's at fault though.

I use it for powering a video display attached to a Nikon D7100 and small flat panel light units. The batteries work perfectly and are simple to charge with the USB cable and charge monitor system built into the battery. Also the ability to use them as a way of topping up my cellphone and ipad is great. Charging is a bit slower than with a separate charging unit but not so much slower that it is a problem. Can't comment on battery life or longevity as yet. But so far I'm very impressed.

Works as a powerbank charges very quickly and keeps the camera running like 4 hours easy. And works flexibly between Neewer light.

Great battery! Using these for my wireless camera transmitter and it takes so long for battery to drain and the good thing is, it has button that shows how much power is left! And the best thing about this is that it charges with a micro-usb cable so you can have a very portable set up with this, camera and a power bank!