ITEM NAME:0.5W 2V Thin Film Flexible Solar Panel Cell Battery Waterproof Power Bank Product Description Description: 0.5W 2V Thin Film Flexible Solar Panel Cell Peel Stick Battery Waterproof Mini Solar Cells Power Bank Specification: Chemical type: amorphous silicon solar cell Structure type: homogenous junction solar cell State of use: flat panel solar cells Output power: 0.5W Working voltage: 1.5V Conversion efficiency: 17% Working current: 250mA Working voltage: 1.5V Open circuit voltage: 2.0V Short circuit current: 420mA Use temperature: -40-80 degrees centigrade Performance: anticorrosion and moisture-proof Packaging materials: high transmittance ETFE film Adhesive: fast curing EVA film with high weatherability and high transmittance Battery type: three junction flexible amorphous silicon thin film solar cells Note: Please allow 1-3mm differs due to manual measurement. Due to the different display and different light, the picture may not show the actual color of the item. Thanks for your understanding. Included: 1 x Solar Panel.Structure type: homogenous junction solar cell. Battery type: three junction flexible amorphous silicon thin film solar cells. State of use: flat panel solar cells. Chemical type: amorphous silicon solar cell.