Polaroid 4000 mAh Power Pack Bank High Capacity Portable Battery, Compatible with All Smartphones, Built-In Flashlight - Retail Packaging - Blue Two Full Smartphones Charges, USB Charge Input 5V 800mA, USB Charge Output 5V 1000mA^4000 mAh Lithium-ion Battery Compatible with All Smartphones, Built-in 4 level Power Indicator^Includes Emergency Flashlight, IC Protector To Avoid Overcharging, Over-Discharging & Short Circuit^Charge Your Device & Power Pack From Any USB Port, Includes Sync & Charge Cable (Micro USB)^Intelligent Power Management To Maintain Efficiency, Long-Lasting Battery Life In A Compact, Portable Size