Plug your power bank into a wall outlet if at all possible. Your power bank must have come with a USB cord and wall adapter. Plug the larger end of the USB cord to the wall adapter. Then, plug the smaller conclusion into your power adapter. Leave the power bank https://modernsmarthealth.com/product/computers/power-bank/battery-capacity/20001-25000mah/yoobao-p20000l-20000mah-power-bank-dual-usb-output-input-portable-charger-with-digital-display-external-battery-slim-powerbank/