aMagisn AA08 3-slot Power Bank 20W Battery Box Battery Charger

Features:
Built-in Large Capacity Battery: With built-in 7710mAh high-capacity battery, the battery charging box can work as a power bank to offer power for 3 pcs Action 4/3 batteries after being fully charged, and supports charging 2pcs batteries at the same time with power up to 20W.
Smart Charging Management: The built-in MCU intelligent charging management system can smartly identify the battery level to quickly accommodate your charging need with the priority charging of the higher battery.
Reverse Fast Charge for External Devices: The power bank can also charge the phone, action camera and other devices reversely with PD3.0 20W power speed when no batteries were inserted for charging.
Multi-Protection for Safe Usage: The battery charger supports input overcurrent overvoltage protection, output overcurrent overvoltage protection, flameproof protection, over-load protection and short-circuit protection, safe and secure.
Lightweight and Portable: Compact size and light weight, easy and convenient for carrying. With magnetic flipping cover, the batteries won't fall out of the charge box. The battery charger can also be served as a battery and memory card storage box.