I was looking for a replacement battery for my Sony Alpha and the K&F Concept NP-FZ100 turned out to be a great choice.

Pros:

Perfect compatibility: The battery works perfectly with my Sony Alpha camera, as if it were an original battery.
High capacity: The capacity of 2280 mAh is the same as that of the original battery, ensuring a long life.
Direct Type-C charging: The battery can be charged directly via the USB-C port, eliminating the need for a separate charger.
Charging indicator: A built-in LED indicates the battery charge level.
Competitive price: The price is significantly lower than the original Sony battery.
Cons:

Slightly shorter lifespan: Like all third-party batteries, the lifespan may be slightly shorter than the original battery.
Missing some EXIF ​​data: The battery may not transmit some EXIF ​​data to the camera, such as the date and time of shooting.
Bottom line:

The K&F Concept NP-FZ100 is a great replacement battery for Sony Alpha cameras. It offers high capacity, convenient charging, and a competitive price. If you don't need all the advanced features of the original battery, this is an excellent alternative.