Thanks to SmartSense™ circuitry, you can charge both your device and IonBank/IonSlim at the same time. Your mobile device will first be given priority to charge and once fully charged then the IonBank/IonSlim will be charged.
Connect the IonBank/IonSlim to the USB-A port of either a wall adapter, car adapter or your computer device. Then connect the other end of the cable to your iPhone/iPad as seen in the image below.
*Note: charging may take longer than normal.