Very very useful for my a7!

I use it often because I take a lot of photos, and when I go far away, I can plug it into an external battery that recharges my SONY batteries via this charger. I am very happy with this article and recommend it.

Amazing value, but battery last about 10% less then oryginal. Having said that it is fraction of the cost plus you get quick charger.

I've been using these batteries (for my a6000) and charger for nearly a year now and haven't been disappointed. Sure the batteries don't last as long as the original Sony ones but that was expected and they are much cheaper. Charger works well and is handy and still use the spare batteries all the time. If you're looking for some cheap spares then these are a good shout!

The first impression when unpacking the set was good, the batteries and charging cradle are neatly finished and make a solid impression. The charging cradle also requires a micro-USB cable/power supply unit, but most probably already have it lying around at home anyway, the charge level is displayed individually for both batteries via a green and a red LED. The capacity of the two batteries can keep up with the original Sony batteries. Considering that this set currently costs less than a single original battery, this is very remarkable, so a clear purchase recommendation from my side.

Works perfectly, good value for money, only had them a week so cant give a full review, but so far so good

This works perfect with my Sony A6100. They fit just the the O.E battery that came with my camera. Charge bay's are nice because you can charge two battery's at the same time. One thing that I have noticed with other brands is that on a full charge according to the base, they are not fully charged on the camera meter. But with this set by K&F when the charging bay show done and the battery is inserted into the camera it does actually read 100%. Battery life is about the same compared to the O.E battery. The only complaint I really have is that is comes with a micro usb cable. The reasoning behind that is that most of my equipment runs usb type c. But on a plus note there is an option on the charging bay to use that cable also. it just not provided other than that This is a great buy!

I tested 5 under battery brands to replace the original battery for my a6400 (video available on YT).
This battery being 3-4 times cheaper than a Sony, offers a very light better battery life (sony 1h25 in 4K approximately, K&F Concept 1h32) and in addition offers you almost non-existent discharge against the Sony that loses a lot of storage (sony in storage a few months, remains 30% battery, K&F Concept 99%, and it is confirmed in time of recording in 4k, amazing..).
Until then, she beats flat with stitching the Sony...
... BUT (it needed one)...
... she has a small flaw that does not (as much) the Sony. The calculation of the% remaining on the K&F Concept is far from predicted, when the battery indicates 0% it actually remains more than 25min of recording, so you have to get used to keep recording but at 0% and evaluate about 20 min before changing the battery.
Apart from in certain specific cases, it is very uncomfortable but a shame...
(This is the same for the Sony at 0% there are still several minutes of recording.. 10 minutes of head but there is less to spoil if we change to 0%)

In the end excellent battery I use without problems for several months, I strongly advise this battery even faced with the shamefully expensive Sony and that does not hold the charge on time!

Even if I choose, I prefer to get used to calculating that I have 20 good minutes left at 0% (the K&F Concept), than to take out my device after a few months to realize that I have only 10% left (the Sony). (especially 4 times cheaper)

If this comment helped you, do not forget to click on “useful”, thank you.

Small, lightweight, fast and takes a standard Micro USB connector? What's not to like.

The batteries themselves seem very good. They’re a slightly higher capacity that the original Sony ones at 1100mah. Having tested them, they last roughly the same length of time as the original Sony ones which is great.

The charger is small, light, takes two batteries (which charge simultaneously) and takes a standard Micro USB charger (which I’m sure you already have a small collection of). There are two LED lights that indicate when charging and when complete etc. The batteries are easy to load and are actually quite secure when in position.

Overall for the money it’s great and I’m happy to recommend it to any Sony shooter.

The A6500 batteries don’t last a super long time because of their size so it’s always great to have extras. I have a number of filters from K&F Concept and they are high quality. These batteries and charger reflect the same level of quality. Very nice.

They also come in a very nice box so are gift-able too.