With an impressive 20800mAh available battery capacity, the Promate proVolta-21 ensures that your Smartphone or Tablet is powered for as long as you require. Featuring three ultra-fast USB charging ports so you can charge multiple devices at the same time and the Automatic Voltage Regulation provides an optimum output based on the device connected. The proVolta-21 is the ideal travelling companion, designed to be portable in size yet offering huge battery capacity.

• Ports: 3
• Battery Capacity: 20800mAh
• Battery Type: Lithium Ion
• Input: 5V, 1.5A
• Output: 5V, 3.1A