Great Service, would use again.

Great product for the price and does the job perfectly.

Compared to the original Sony replacement batteries these are a bargain and seem to last longer than the one that came with the camera.

Brilliant batteries they hold a charge really well and used in conjunction with the original Sony NP-FW50 taking all 3 batteries out on a shoot you'll do well to get through all batteries in a day - I've frequently taking the newer batteries out and shot over 1000 photos a day with some charge left in at least one of the K&F Concept batteries after exhausting the original and one of the K&F Concept brand - very nice packaging it all arrives in with usb lead and documentation thats easy to read no dodgy Chinese interpretation of words which gives you confidence on electronics when you get them we've all seen them ' power is excellent for making photo safe in your world ' ! etc , and the charger itself hugs the batteries nicely whilst on charge no 'flopping about' once clicked in , the LED's are easy to read going from very bright red to green when charged , charging is pretty quick too the original 'in camera' charge on the Sony A6400 is pants - a fiddly micro usb and a dim orange led thats hidden under said usb that you can't monitor unless you pick the camera up to eye level ( come on Sony you need to sort this one out - amazing camera but sack the charging designer guy tho lol )
I fully intended on purchasing second set of 'K&F Concept's' after making sure these ones worked OK but won't be needing to as I personally as a hobbiest rarely take more than 1000-2000 shots a day , even when I've used them abroad on a shoot I've never been without charge whilst roaming and charged them when I've got back to a Hotel - I thoroughly recommend these batteries and charger and I'm pretty fussy when it comes to putting cheaper batteries in my hard earned 1000 quid camera :)

It's great, havnt noticed a considerable charging difference or increased life but it works fine. Will recomend

Travel and Leasure

Compact, easy to operate and very economical.

Totally fine, no major complaints off the bat with these. The charger isn't the best design- it only tells you if it's charging or charged, without indication of exactly how charged the batteries are.

Time will tell if the actual batteries hold up- it's been about a month and they haven't gone bad, so at least I didn't get any particularly terrible ones. I had another set from a different brand where one battery took 6 months before it became unusable, and the other battery took a year. Meanwhile my original Sony branded battery is 2 years strong and shows no strange behavior, just *maybe* slightly lower capacity than my newer Sony branded batteries. It seems to be a trend that these non OEM batteries just aren't made with high quality cells, so hopefully K&F Concept's batteries will be a change from that. I've liked K&F's other products, so hopefully these won't be an exception.

I keep all my batteries labeled (A, B, C...) including their first use date, and I evenly cycle between all my batteries (after A is done, I move to B, then C, etc... until looping back to A). That way, none of my batteries get used harder and more often than the others. In turn, that allows me to catch a bad battery early, and know that it wasn't because I used it far more than the others. Hopefully I'll remember to update this when these batteries finally go kaput (or at least start acting funny).

I got this and a battery grip for my Sony a6000. Went on vacation and only shot photos and the batters lasted all day. It was 90degrees outside and no issues.

Great price especially with the included dual charger.