This K&F Concept GoPro Battery and Charger Kit is a great solution for any GoPro user looking to extend the battery life of their cameras while saving money. Here is my detailed review after testing it:

Design and Compatibility
The kit includes two "enduro" type batteries compatible with the GoPro Hero 9, 10, 11, and 12. Each battery has a capacity of 1730 mAh, slightly higher than the original batteries, and is equipped with a smart chip to ensure reliable performance.

3 Slot Charger
The included charger can charge up to three batteries simultaneously, which is extremely convenient for heavy users. It supports both USB-C and micro-USB for maximum flexibility when charging.

Performance
I found the batteries to provide comparable battery life to the original GoPro batteries. They charge quickly when connected with a good USB-C cable and a suitable charger (minimum 5V 2.1A). The charger indicates the charging status with a red light during charging and green once it is finished, which is very practical to know when the batteries are ready to be used.

Use and Transport
Compact and lightweight, this charger is easy to carry in a backpack or bag, ideal for travel and outdoor adventures. It even plugs into a USB port on a motorcycle, which adds to its versatility.

In conclusion:

The quality is good.✔
I am satisfied.