Update: Deal over.

Poweradd Pilot 20000mAh External Battery Power Bank for Smartphones and Tablets – Link

Today only, Amazon has this on sale for its lowest ever at only $16.59.

• Smart Charge: Auto detect the status of your devices, intelligently deliver power at fastest possible speed with 2.1A (max) output.
• Huge Capacity 20000mAh: charge iPhone 6 eight times, Samsung S6 over five times, large capacity iPad Air 2 almost twice.
• High Output Design: Double USB Ports, 2.1A and 1 A output, convenient for 2 devices to charge simultaneously.
• Grade A battery cells: long lasting power and long battery life, reliable and safe Comes with a Micro USB cable and user manual.
• Enjoy Our Industry-Leading Warranty: 24 months limited product warranty and 24*7 easy-to-reach customer service.