Anker PowerCore 13000mAh 2-Port Ultra Portable Charger with PowerIQ...

Upgraded Capacity: The successor to PowerCore 10400-identical compact size but packed with even more power. Charges an iPhone 6S 5 times, a Galaxy S6 3.5 Times or an iPad Air 2 once
Light and Compact: A super-high 13000 mAh capacity with two high-speed-charging USB ports is all contained in a portable charger smaller than a wallet
High-Speed Charging Technology: PowerIQ and VoltageBoost combine to give a max speed charge to any device (up to 3A – Qualcomm Quick Charge not supported). Input: 5V / 2A