Compact monocrystalline solar panel designed for small solar projects and low power charging needs. Weather resistant and built for outdoor use, it delivers stable low voltage output to charge 3.7 V batteries and power small devices. Key benefits Reliable outdoor use: weatherproof construction lets you leave the panel exposed to sun and typical outdoor conditions without frequent maintenance. Stable electrical output: rated working voltage 5 V and working current 50 mA for predictable charging and device operation. Battery compatibility: suitable for charging 3.7 V rechargeable batteries used in many small electronic projects. Efficient cells: built from monocrystalline solar cells for improved energy capture in compact form. Cost effective and long lasting: designed for repeated use across experiments and small systems while keeping costs low. Main features Rated power: 1 W Working voltage: 5 V Working current: 50 mA Compatible with 3.7 V batteries Monocrystalline solar cell construction Weather resistant weatherproof design for outdoor exposure Practical applications and use scenarios Home lighting backup: charge a 3.7 V rechargeable cell during the day to power LED strips or lamps for garden or pathway lighting at night. Educational and science projects: power sensors, microcontroller projects, and small demonstration setups that require a stable low voltage source. Small water pump and hobby systems: supply energy for miniature solar water pumps, small circulating pumps, or compact off grid experiments and prototype systems. Why choose this panel Solves the need for a small reliable solar source when mains power is not available or when you want a self contained renewable power supply for experiments and small devices. Simple to integrate: compatible with common 3.7 V batteries and easy to connect to low power electronics. Durable outdoor performance reduces the need for frequent replacement or sheltering. What is included and compatibility Solar panel rated at 1 W with monocrystalline cells and weatherproof casing Intended for direct charging of 3.7 V rechargeable batteries and for powering low power devices up to the rated current and voltage suited for small home projects, electronic applications, science projects, and small solar systems Usage tips Place the panel in direct sunlight for charging and performance. Use a charge controller or proper charging circuit when charging lithium based 3.7 V cells to ensure safe charging. Match device or battery power requirements to the panel ratings to avoid undercharging and to ensure stable operation. This panel provides a compact, weather resistant solar solution for lightweight charging and small scale solar projects without complex installation.