Solar lawn light control panel with integrated battery protection and automatic day night switching Key benefits Protects 3.7V lithium batteries from overcharge and overdischarge with precise thresholds: overcharge cutoff at 4.25V and overdischarge cutoff at 2.8V. This protection helps prevent battery damage and supports longer usable life. Automates charging and lighting so the system charges during the day and illuminates at night without manual intervention. Threeposition switch provides off, full power, and low power settings for flexible runtime and brightness control. Reduces installation time and wiring errors with a clear circuit layout and precision predrilled mounting holes spaced at 25mm. Ideal for fast retrofits and solar lawn light control panel projects. Built on a printed circuit board using components to maintain stable operation across changing outdoor conditions, improving durability and reliability. Features and specifications Battery compatibility: designed for use with 3.7V lithium batteries. Protection thresholds: overcharge cutoff 4.25V, overdischarge cutoff 2.8V. Operation modes: threelevel switch control: off, full power, low power. Mounting: precision predrilled holes with 25mm spacing for straightforward attachment. Construction: PCB assembly with components for stable outdoor performance. Why this product solves common problems Prevents battery failure from repeated overcharging or deep discharge, reducing the need for frequent battery replacement. Removes guesswork from daily operation by switching automatically between charging and lighting, so lights are ready when needed without manual control. Simplifies installation and retrofitting, saving time on DIY projects and reducing the chance of incorrect wiring. Offers a rugged electronic base that stands up to variable weather so the lighting system remains reliable. Typical applications Garden and pathway solar lights: or upgrade the control board in walkway and garden lamps to restore automatic day night function and protect the battery. DIY solar lighting projects: Use in custom solar lawn light builds where a reliable charge controller and simple brightness control are required. Residential outdoor lighting retrofits: Retrofit aging solar fixtures with a compact control panel to improve battery management and add selectable brightness modes. What to expect during installation Mount the control panel using the 25mmspaced holes for fast alignment. Follow the board layout to connect the 3.7V lithium battery, solar panel input, and LED load as required by your fixture. Select the desired mode with the threeposition switch: off for maintenance, full power for maximum brightness, low power for extended runtime. This control panel provides a practical, compact solution for reliable battery protection, automatic day night switching, and easy installation in solar lawn light projects.