NP-FZ100 Battery Charger Set for Sony Alpha A7 III, A7R III (A7R3), A9, a6600, a7R IV, Alpha a9 II (2-Pack, Micro USB Port, 2280mAH)

I have been using this brand's products for a long time, and I used their battery for the first time. I am very satisfied with it. It also comes with an adapter, and the fact that it charges via Type-C is an added advantage. I highly recommend this product. The customer service was also outstanding.

This combo of charger and batteries is the best! My husband shoots video with A7iii and A7C cameras for different types of events and video content for small business owners, and he's in constant need of an arsenal of batteries ready to use. He goes through batteries very fast. So I ordered this combo to test it out and so far he's been very pleased, especially because they charge pretty fast. That's what he likes the most, and also that they last for at least two consecutive shoots in a day.

I've been using these batteries in my A9II without any issues, minus the warning at the startup that says I'm using a third-party battery.

For the price, I think this a good value as you're getting two high-capacity batteries and a dual battery charger at more than half the price of an OEM battery. It works as great as the OEM, and I haven't had any issues. One minor thing is I wish it had a battery cover similar to other batteries I've bought in the past, as this is usually how I mark if my battery is freshly charged or needs charging.

I've been a Sony shooter for years and have always used Sony batteries. I have some K&F Concept filters and accessories, and being very pleased with their quality decided to try these batteries.

The first thing I did was use the supplied charger to give them a full charge. The kit includes a USB type-A to USB-C cable but you need to provide your own wall adapter. For convenience, the charger also has a micro USB port for charging.

The charger only displays RED when the batteries are charging and green when they're fully charged but not the existing charge level. When I put the batteries in my Hahnel charging cube or my Sony charger, they accurately reported their charge level, just as Sony batteries do.

Then cam the camera test - which these passed with flying colors. The camera recognizes the batteries and displays the level of charge remaining.

For less than the price of one single Sony battery, you get two equivalent batteries AND a dual charger that is compact and a great size for traveling.

It's always smart to have spare batteries when you're out shooting, particularly when traveling and this is a very budget-friendly way to make sure you have those extras on hand.

I would highly recommend these to anyone looking to have some extra NP-FZ100 batteries on hand, and I would not hesitate to purchase this again.

This is a strong 5-star product in my opinion.

I shoot a Sony A7r4 for photo and a bit of video - When I do indoor shoots with a tripod, I use a wired battery adapter. But then there's every other time, which is how I got here.

I've already got a few other pieces of K&F gear which I consider well balanced for quality vs price. Photography has never been inexpensive, so I look for opportunities where I can. Let's dive in.

As of this review, we're at around $50 for this bundle, which is quite drastically lower than the Sony equivalent. Sony gear is quality, yes, and you pay for that, yes, and typically don't regret it, yes. But I have a thing with batteries. I don't want dubious ones, but overpaying for proprietary ones, also nah.

Refer to the photos.

Packaging: perfectly adequate for the contents. No styrofoam. I despise styrofoam. Check.

Included items: some reviewers received type A to micro usb cables. Mine arrived with a type A to usb c. Not sure why, but I'm always glad to get a C these days. The cable isn't fancy. I don't really care. Check.

The batteries themselves: slightly lighter than OEM, build quality, perhaps a negligible tad less. Claim 2280mAh at 7.4v,16.8wh. OEM 2280mAh at 7.2v, 16.4wh. So, on paper that might sound better. It actually isnt. Other reviewers performance notes accurately measure slightly lower runtime. The camera doesn't need 7.4v, those 2280mAh expend quicker for no appreciable gain. However, the difference is minor. Don't worry about it. Instead, appreciate that K&F managed to produce a battery that doesn't throw a warning when you power up the camera, and are forced to "accept the risk". Lots of after-market batteries have that issue, these don't. For me, this is a big plus. Good job K&F.

The charger: light, not robust, but not janky either. The USB options are a compromise. Sony's standard single bay is an AC plug and you get a lot more juice for "quick" charging - It's also a reliable source. USB is more versatile and convenient, but less input. So. 700mA for a single battery, dropping to 500mA for dual. It's gonna be slow, and your USB input, well. Who KNOWS what you're going to try charging with. Something embarrassingly inadequate, perhaps. Anyway, that's the trade-off. I'm fine with it. Observe the difference in size. Do I miss the meter from the OEM? Yeah, somewhat. But the two chargers are interchangeable, I tested that. Cool.

Durability, we'll see. My other K&F gear has held up quite well, I do treat it respectfully and I don't use it all day every day. I'm waxing optimistic.

Conclusion: this bundle is like... Less than a quarter of the OEM price. Haha! Five stars. Hope this review was helpful to you, happy shootin'.

K&F Concept Dual Slot Charger is a convenient way to charge up to two NP-FZ100 batteries at one time. Before I purchased this charger, I had to attach my camera to a computer via USB to charge the battery (not super convenient as you can imagine).

Now I'm able to continue shooting while the batteries charge. This is really a great deal because you also receive two K&F Concept batteries with the charger. These batteries are better than other non-proprietary batteries I've used in the past.

When you get the package, it has a surprising heft to it. The two batteries came 80% charged and the charger works fine with the OEM pack.

Fit and finish are as good as OEM at a fraction of the price. No issues in camera.

Added bonus: charger accepts USB micro or USB C as input.

The batteries are well built and works as per the OEM batteries. I tried in my Sony A7III and it works perfectly. No sign or non-OEM warning or anything.
I like the fact that the charger comes with two ports for connecting to power source. Specially USB-C since this is going to be the standard in everything ( already in Europe). USB-C port also charges faster.
My only nitpick is that you won't know how much progress it has made when it is charging. It just goes from red to green.

I've been using Sony cameras for quite awhile now and have tried a number of different third party batteries, so when I saw K&F Concept offering their version, I thought they would be worth a try, given the K&F have been around a good while.

Of course the main issue with 3rd party batteries is whether the camera flags it as a fake every time you start using it. In this case, I am please to say that my camera booted up with no warning whatever, so these passed the primary test.

One word of warning, though, is that I've had 3rd party batteries work fine until a new firmware version is released. There has not been any new firmware for my camera recently, so I cannot speak to that issue for these batteries.

I have given these the full 5 stars because of the value they represent. For less than the price of one OEM brand name battery you get two batteries and and decent charger. In my opinion, the value makes it worth the risk of them becoming unusable at some point in the future.

The batteries come about 2/3 charged and that is what is displayed on the original Sony charger.

The included K&F charger is very basic and has just a red / green indicator light, no status level for the batteries which I would have liked to find here. From that perspective, I am not a fan of this charger, I am not able to check the battery level with it.
The batteries specs (2280mAh / Voltage: 7.4V / WH: 16.8Wh) differ slightly from the original Sony FP-Z100 batteries (2280mAh / Voltage: 7.2V / WH: 16.4Wh) -- I would have liked to see the exact same specs.

The camera (with a firmware 2.0 update) recognized the battery and its charge status is displayed on the screen.

Even with the slightly different specs, the power and endurance seem like the original batteries. I cannot offer longevity observations due to a lack of long-time use.