It can be used for retrofitting or repairing solar integrated street lights. To connect the battery, the battery must have its own protection board. This control board does not have overcharge and overdischarge protection. 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: 0.15652820602 pounds, Manufacturer: Yoeruers