Maelu 5.2W 12V Polycrystalline Silicon Solar Panel Mobile Phone Digital Products Portable Solar Panel Kit Maelu 5.2W 12V Polycrystalline Silicon Solar Panel Mobile Phone Digital Products Portable Solar Panel Kit Build your DIY powered models/solar toys / solar displays When the voltage of your solar panel don't satisfy your storage battery, you can take two or more same solar panels together in serices. Such as,two 6v solar panel take together in serices, so its voltage is 12V. when the voltage of solar panel satisfy your storage battery. In order to Speed up the rate of charge, you can take two or more same solar panel together parallel connection. It can be used for teaching purpose. Many of our customers comes from school,colleague,etc. You can charge the emergency when you are traveling, or when your cell phone battery is dead time.