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.