The Härkila Power Bank is sturdy and powerful, with the capacity to rapidly and efficiently get Härkila’s Heat products up to temperature, and also charge other electronic devices when you are on the go. The Härkila Power Bank contains a Lithium-Polymer battery with a capacity of 10,000mAh and input/output of 5V/2.0A. The charge time is around 6 hours and the power bank can be recharged approximately 500 times. The power bank can be used at temperatures between -10C and 45C. A micro-USB charging cable is supplied, and, along with the USB output port, the power bank incorporates a LED indicator to show the battery’s level of charge. The power bank features protection against short circuits, over-voltage, incorrect connection and overheating. When not in use, it goes automatically into standby to save battery power. Harkila Power Bank Vers. 2 for Heat Products