Features: Working Time: The charging time is 6-8 hours and the working time is more than 8 hours. Round Dia: The diameter of the solar panel is 8 cm.Use for replacing solar panels, for defective solar panels. Replacement: the replacement cover for solar light is suitable for solar light. Sun top for solar lantern High Efficiency: This solar replacement lid polysilicon 25% efficiency. Includes one 600mA 1.2Vrechargeable battery, this replacement top features 1 LED DIY: This DIY light cover has a switch on the bottom and opens the switch while charging. Auto On: This lid light is automatically switched on and off and immediately becomes a solar path lighting/solar garden lighting. Specification Material: Plastic Color: Black Solar power round lid dia: About 80mm/3.1inch Solar power: 2V,120mA Solar powered plate size(L x W): About 50 x 50mm/1.97 x 1.97inch Battery: 600mA 1.2V rechargeable battery(built in) Package included: 1pc x Solar Lights Replacement Top Note: Please fully charge the device under sunlight before first use. If there is no enough sunlight in 3 months, the battery may run completely flat, and will decrease battery life, so please charge in time. Once its fully charged, unlock the device and lighting system. Otherwise, it wont work anymore. If there is no enough sunlight, especial in North countries. it may take longer time to fully charge the device.This is very normal for solar products.