It can be used for retrofitting or repairing solar integrated street lights. This control board does not have overcharge and overdischarge protection. To connect the battery, the battery must have its own protection board. Compatible with 3.2V lithium iron phosphate battery and 3.7V lithium battery. There is no battery in the remote control. You need to buy a AAA battery by yourself., Weight: 0.31305641204 pounds, Manufacturer: Yoeruers