15000mAh Outdoor Solar Power Bank Universal Strong LED Light Solar Charger External Battery for Mobile Phone Specifications: Capacity: 15000mAh Solar Panel:1.5W Input:5V-1.0A(Max) Output1: 5.0V,1.0A(Max) Output2: 5.0V,2.1A(Max) Size:122*76*20mm Weight:300g Features: 1. Shell and other feel good and wear-resistant characteristics of the metal aluminum. 2.We use the imported original battery cell, it is more durable and have long using life. 3.Support both electricity and solar charging. 4.High quality Polymer lithium ion battery battery , long life and safe. Package: 1*Solar power bank 1*USB cable The solar function is specially designed for emergencies,it’s not a primary source of charging due to the compact solar panel size, it charges slowly and ensure that the powerbank has some power before you charge it by solar. In general usage, we recommend charge the solar power bank by cable to shorten the charge time.) Note Though we only supply USB Cable , but you can charge any machine with this battery with your own USB charge cable !! How to use 1. Usually there is internal resistance in all mobile. and power bank will lost power when you charge mobile because this internal resistance. we called it is Conversion Rate 2. About 5 to 6 hours charge can get the power bank full of power in normal times 3. charging time depending on charger.the more,the faster 4. the output power is different for every mobile. because mobile internal resistance is different. 5. All the power bank has Conversion Rate,as well as your phone,Charge will happens twice energy conversion! 6.The conversion rate may be 45%-60%,As a result we will fell the real capacity lower than the Rate Capaity,This kind of phenomenon is quite normal.