How do I use my ATJ-CA100 as a power bank? The Cordless Digital Inflator may also be used as a portable battery bank for remote, on-the-go charging of smartphones, tablets, speakers and more. Devices may be charged through the USB-A port. Charging will start automatically upon connection. Related articles How long does it take to charge / How long does it run for? Why isn't any air coming out of the High Volume hose? How do I add more pressure beyond my selected “auto shut-off” pressure setting? How do I maintain and store my ATJ-CA100? What is the cleaning gel made of?