JoyTech 1.25w 5v 250ma Mini Solar Panel Module Solar System Epoxy Cell Charger DIY Product Detailed Description: 1) Model Number: GP116*116-10B250 2) Size: 116 x 116mm 3) Material: Polycrystalline Silicon 4) Number of Cells: 10 5) Max. power: 1.25W 6) Max. current: 250mA 7) Max. voltage: 5V Configuration Relationships between solar panel and storage battery       Storage Battery             Solar Panel             1.2V                      2V ~ 2.5V             2.4V                      3.5V ~ 4V             3.6V                      5V ~ 6V               6V                       7.5V ~ 9V             12V                       15V ~ 18V
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