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.