PASS THROUGH Charging: Support charge and discharge at the same time. The function is activated by pressing the power button for 2 seconds while the power bank is recharging. Note: It will turn off after 1 minute to save power if there is no device connecting to it. HIGH CAPACITY 50000mAh/185Wh: Compatible with popular laptops. It includes 14 connectors for laptops and a Mag-Safe 2 cable for MacBook Pro & Air. (Pls make sure the connector fits for your laptop before purchasing). DC-IN 19V/2A enables the power bank to be recharged in 7 hours.