USB Sock-IT Pro Series Voyage Power Bank (Black) 8,400 mAh, Lithium-Ion 18650 batteries. Up to 90% rated power available versus 70% for Lithium Polymer Sophisticated LED Multi Icon Display. Percentage Power available. Power In. Power Out 2.1 amp/1.0 amp. Flashlight on. Auto shutoff removes power out icons when connected device is fully charged Pass-Through Charging. While recharging the Voyage you can connect your Smartphone and Tablet and charge all 3 Devices from 1 AC wall charger, eliminating the need for extra AC plugs and AC Wall Chargers. The perfect device for the business traveler. Fits in the palm of your hand