Levin Dual USB Port 5000mAh Portable Solar Panel Charger for iPhones, Windows and Android Phones - Green Grade A cell, Build-in 5000mAh Lithium Polymer battery which chareges via a powerful 1.2W monocrystalline solar panel ; 2.1A output allows for simultaneous charging of your devices at high speed ;Anti-explosion, lightweight, compact and reliable, 1000+ recharge cycles over the life of the battery. Please do not place on over-heated place for continuous charging. is with built-in Polymer battery, one of the safest battery in the world, which are not possible to explode even over-heated, but it might swell up. Package includes: Levin&Trade; External Battery, hook, micro USB cable, instruction manual. The first rain-resistant &shock-proof portable solar charger on the planet; Solar energy technology, environmental friendly and could recharge itself under sunshine for emergency purpose when outside; can charger your iphone about 50% to 60% juice for emergency after being solar charged for 7 to 8hrs under normal sunlight, It's not easy for 1.2W input Solar panel to fully charge the buit-in battery with sunlight, thus, we suggest it for casual use,For long trip,hiking, Levin Sol-wing would be a perfect choice. . Water resistant design ensures the device functions smoothly when it's raining; Shock-proof feature ensures the device working properly even it crashes or drops. Compact, portable &amp; stylish design; Easily fits into your bag to provide instant power; Football grain design has anti-skid protecting effect The LED flashlight works perfectly in darkness, especially for emergency. Just press the button twice, the LED will light up; 4 LED status of charge indicators indicate the charging and discharging process.