The BLK22 batteries from K&F CONCEPT are a useful addition to the originals, as they have a USB-C port, which can be used to charge the batteries directly. In concrete terms, this means that in an emergency, a power bank can also charge the batteries on the go via USB-C cable. This is particularly useful for system cameras, as they require significantly more power than the old DSLR cameras, for example.

It goes without saying that the BLK22 batteries from K&F CONCEPT fit perfectly into the cameras and the workmanship also leaves a high-quality impression. But I also expect that. Charging the batteries in the original charger also works without any problems.

I was unable to notice any differences in performance after charging 4 times; they last as long as the original batteries in all 3 Lumix cameras (G9, S5, S1iie). Nevertheless, I would always remove third-party batteries if the camera is not used for a long time, because should someone inflate, the warranty is over. However, this has never happened to me before and I use third-party batteries for various cameras from different manufacturers.

The K&F CONCEPT batteries for Lumix cameras are the ideal addition. They offer good performance, make a high-quality impression and can be charged via USB-C. There is also a very fair price for the double pack. I therefore recommend them as an addition to the original batteries. I therefore give 5 stars for the double pack of K&F CONCEPT.

The batteries fit perfectly into my DC-G9 and are recognized without any problems. The performance is convincing in everyday use, even during extended use, so you can rely on the running time. The USB-C connection directly on the battery is particularly practical, which allows the batteries to be charged flexibly and without a separate charger. The two batteries each arrive individually packaged and overall make a high-quality impression. For me, they are a very useful addition to the original battery and offer excellent value for money. I received the product for free as part of the Amazon Vine program, but it didn't affect my honest review.

I wanted to try these batteries, having already seen others compatible for Panasonic, the same model, which are also good for the Sigma SD Quattro.
Even these are actually usable even on sigma.
Compared to others, they have the advantage of not requiring a separate charger (they enter the machine but not in the Sigma charger) but it is also possible to charge them via USB, with the advantage of freeing up space in the suitcase and using the same charger for telephone, photo, etc. I am

not yet able to evaluate their reliability on intensive and prolonged use. The 2520 mAh capacity bodes well.

The set of 2 K&F CONCEPT 2520 mAh DMW-BLK22 batteries comes with information material and a USB-C/A charging cable.
The two batteries are perfectly manufactured and fit easily into the compatible camera. They have a USB-C port so that they can be charged using a USB-C cable and an LED that shows the charging process.
This is much easier than always charging them in the camera or a charger.
Why don't camera manufacturers do the same?
The performance is very good and we haven't noticed any significant difference to the original batteries so far.
Good price and quality too!

I took the time for a photo and video shoot all day to see what's going on with these batteries with my Lumix S5IIX.

The manufacturing quality is very good, the plastic is certainly thinner than the original batteries, but it gives an impression of solidity.

Now autonomy... It's currently superior to the original batteries and it's hard to beat Panasonic in this category because they're a bit of the kings when it comes to batteries.

So the autonomy is better and with the USB-C port which is very practical for recharging on the fly when on the go I don't see what I could add, only time will tell if they still hold the charge...

Always love K&F gear and this is no exception. This DMW-BLK22 2520mAh battery has been solid in my Lumix S5II - it fits like OEM, the camera reads it properly, and performance has been consistent.

The best part is the USB-C port on the battery. Being able to charge it directly from a power bank or car adapter without carrying a separate charger is clutch when I’m out on a shoot and trying to keep the kit light and simple.

Bottom line: reliable BLK22 power with the convenience of direct USB-C charging. Easy 5/5.

Lasted very long and charged pretty fast enough you can charge then swap then charge then swap

Photographers know that more batteries are always better than fewer. This set is great to have for those who enjoy recording video. I use these in my Lumix G9, and recording video tends to eat through my batteries. These are rated as higher capacity than the OEM, but for whatever reason the OEM is undefeated in terms of recording time. That being said, one OEM battery costs significantly more than this set of two batteries, so the value here outweighs the slightly longer run time of the OEM. The USB-C charging is also a great feature if you need to charge these in a pinch. I enjoy the peace of mind of having these batteries available. There is nothing worse than seeing a single bar left on your battery and knowing that you don't have a backup on hand. This solves my problems.

I really like these K&F Concept batteries for my LUMIX S1RM2. With a 2520mAh capacity, they provide noticeably more runtime per battery than the OEM versions, which makes a real difference on longer shoots.

What stands out

Higher capacity: Delivers more shooting time per battery compared to the original Panasonic batteries.

Built-in USB-C charging: A huge convenience when traveling. I no longer need to pack a dedicated charger, just a power bank and a USB-C cable.

Efficient workflow: I can charge one battery while continuing to shoot with the others, which is ideal in the field.

Good charging speed: Fully charges in a reasonable time without excessive heat.

Excellent value: Very competitively priced for a two-pack with these features.

Final thoughts
These batteries combine higher capacity, practical USB-C charging, and a great price, making them an easy recommendation for LUMIX users. They simplify travel, reduce the amount of gear I need to carry, and deliver excellent real-world performance.

Im a fan of these type direct usb charge batteries. I like to give different color batteries so I can easily identify which ones I already used. These being white instead of the typical black make things easier when combined with another black battery. KF is a known brand and these last as long as the original Lumix battery.