Eco friendly and easy to pack in a pocket, rucksack or hand bag, the SOL1850 Solar charger and battery power bank features a monocrystalline solar panel and charges fully in 10-15 hours. Charged in under 3 hours by USB, the LED display on the back of SOL1850 indicates the level of battery and solar charge. It comes complete with charging cable and connectors and a 3 year warranty. The SOL1850 doubles the standby and talk time of most smartphones and is highly efficient. Built in software controls the temperature, voltage and current, which is housed in a robust, temperature resistant plastic case.