Small and lightweight.Portable， able to charge your devices anytime at anywhere.With led light indicator，showing the percentage of power remained.LED Flashlight function，which could be helpful in the dark.Adopt high-stable switch power to control circuit and intelligent single-chip power management scheme.High power conversion efficiency: the power conversion is as high as 90% or above， much higher than other similar products.Suitable for most smart phone and devices protection IC to prevent over charging， over discharging and short circuit. Specification：1. Input: DC 5V 1A2. Output: 5V 1A，5V 2.1A ≥59wh3. Built-in battery capacities: 3.7V/20000mAh 74wh4. Battery Type: Lithium Battery5. Charge retention: >5000hrs6. Cycle life of charging: 500 times (1 time = from 0% to 100%)7. Net Weight: 445g8. Size: 162.5*79.6*22mm Features:1. Dual USB output.2. Built in LED flashlight.3. It take 14-16 hours to fully recharge when power bank batetry 0%.4. Compatible for any phone， tablet， MP3， MP4， PSP， GPS， game device， camera and many more (just connect with your USB cable).5. LED display (display battery percentage， in / out charging status)6. Intelligent voltage recognition chip automatically detects the voltage.7. Built in battery protection IC to prevent over charging， over discharging and short circuit.

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