Automatic voltage identification; activation function with loss; imported componentsShort circuit protection; reverse connection protection; overload protection; undervoltage protection.3.7V battery fully charged voltage 4.2V, over discharge protection 3.2V7.4V battery fully charged voltage 8.4V, over discharge protection 6.4V11.1V battery fully charged voltage 12.6V, over discharge protection 9.6VModel Number:lithium battery solar lawn light circuit boardMaximum Current:3AApplication:Lighting ControllerSupply Voltage:3.7V/7.4V/11.1VApplication:Garden lightTpye 1:lightsTpye 2:Camping lightsTpye 3:Outdoor lights 1:Backyard Garden light 2:Backyard light 3:Street lightPanel voltage: Less than 30VRecommendation:Please charge the 3.7v battery with a 5v battery board, and the is below 11WPlease charge the 7.4v battery with a 9-12v battery board, and the is below 22WPlease charge the 11.1v battery with the 18v battery board, and the is below 36Wcolor:GreenMaterial:plasticPackage Contents:1 x Solar Light Circuit BoardOnly 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.