1.Photovoltaic Solar Power Control Switch: Experience the convenience and versatility of this night light LED lamp control switch that effortlessly manages solar charging and discharging. This flexibility allows for seamless integration with different battery systems. 2.Daytime Charging, Nighttime Lighting: Embrace the energy-saving benefits of this solar battery charger module. During the day, it efficiently charges the connected battery using solar power, harnessing the sun's energy to provide sustainable and cost-effective lighting solutions. 3.Perfect for Low-Power Applications: Unlock the potential of this solar lithium battery charging controller board, specifically designed for low-power devices and lighting applications. From solar-powered yard lights to decorative light strings, lawn lights, and even small-scale street lighting, this module caters to a variety of needs. 1. Charge during the day, turn on the light automatically at night, turn off the light automatically at dawn, the output voltage is the output voltage when there is no voltage from the battery. 2. The circuit controls the output by detecting the voltage change generated by the solar panel, no need for photosensitive components; suitable for all kinds of batteries. Wiring Method: 1. B+B- connect to lithium battery 2. S+ S- connect to solar panel 3. L+L- output Wiring Order: 1: Connect the lithium battery, the battery must have the corresponding protection plate 2: Connect the LED, the lithium battery is powered LED light 3: Connect the solar panel. At this time, the solar panel has light, LED off, no light LED on. (Different batches may have different printed characters, which not affect the use) Color: As Shown Material: PCB Package Contents: 10 * Modules Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.