Shop through a wide selection of Portable Solar Mobile Phone Chargers at Inter-Warehouse.com. Portable mobile phone solar chargers are chargers that uses solar energy to supply electricity to devices or batteries. Portable solar chargers use solar panels to create a charge, and can be used when no electricity supply is available. Some solar chargers include an internal rechargeable battery, which can be used to charge a mobile phone and other rechargeable devices such as Bluetooth headsets and music players. Small portable solar charges are available to charge a range of different mobile products. Typically, a solar panel's voltage fluctuates depending upon the intensity of the sunlight, so a voltage regulator is usually included in the charging circuit. Solar chargers on the market today use different types of solar panel technology, from thin film panels to the slightly more efficient monocrystalline panels. Monocrystalline solar panels are made up of single crystal of silicon, while polycrystalline solar panels are made up of many silicon fragments melted together.