I bought an extra battery right after I received the Mavic Mini 2 "Fly More" combo pack. The DJI backpack has a large charger with a compartment for 3 batteries, so I needed an extra charger for my extra battery. This battery charging hub from VCUTECH was the perfect choice as it is more compact and has a solid build with quality design. While the two batteries are being charged, the red lights will illuminate to indicate that the batteries are initially empty. After the batteries are installed and the hub is connected to a power source, the red lights will glow for a while and then turn blue to indicate that one or two batteries are charged. Happy with how well it works I am now looking at other my VCUTECH products for my Mini 2.