Amazon.com: RAVPower Portable Charger 6700mAh (2.4A Output & 2A Input) External Battery Pack iSmart Technology for Smartphones Tablets and more – Silver: Cell Phones & Accessories
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• 2X Faster Charger: 2A input can save half of the time to fully charge the 6700mAh portable charger (please use a 2A or higher output charger); 2.4A output makes it charge other devices 2X faster than other chargers. The maximum input and output for the fastest and strongest charging experience.
• Exclusive iSmart Technology: Charge faster and smarter than others, automatically detects and delivers the optimal charging current for any connected device- ensuring the fastest and most efficient charge.
• Compact Body, Amazing Capacity: Fitting in the palm of your hand, get two full charges for iPhone 6, or more than one charge for large phones like 6 Plus, Note 4, etc.
• Unique Design: Made with an ergonomic design that is carefully matched with a gorgeous metal shell that will transform you into a style icon, while 4 status LEDs keep you informed of remaining capacity.
• Safety Protection: Ultra reliable A+ Lithium-Ion battery with over 500 battery charge cycles; short-circuit and over-current protection. This battery pack will automatic shutdown if a short circuit or overload output occurred while unit is charging.

Feedback RAVPower 6700mAh Palm Sized Portable Charger (2.4A Output & 2A Input) with iSmart 2.0 Technology Power Bank External Battery Pack for Smartphones Tablets and more 4.7 out of 5 stars 88 $11.99  Prime Feedback External…