Charge the power bank via the 1st USB-C port with a PD power supply, highest power input support up to 45W. After the power bank is fully charged, solely using the 1st USB-C port is also able to support PD charging to laptops up to 65W or alternative plug connect up to 4 devices to charge them all simultaneously. The smart IC will keep maximum 45W for the 1st USB-C port and distribute 20W evenly between the rest of the charging ports. The power bank is also implemented with short circuit, over charge, discharge, and over current protection to prevent damage to both power bank itself and connected devices. With perfect calculation, 26800mAh (99.16Wh) is safe to hand carry on flight without needing screening before boarding or checking-in.