converter compatible with for 18-volt Li-ion batteries (48-11-1815 / 48-11-1820 / 48-11-1828 / 48-11-1840 / 48-11-1850 / 48-11-1860, etc.) Power adapter connector is well-made, snug fit your battery, can install and lock battery easily. Our voltage buck converter adopted synchronous rectification technology further improve conversion efficiency and good stability. Power conversion efficiency can reach 95%. Voltage regulator equipped smart chip provides Over-current, Over-load, Low-load, Over-voltage, Under-voltage, Over-heat and Short-circuit intelligent protection. We upgraded low voltage protection, this voltage converter built in over low voltage protection. We combine the battery adapter and the voltage converter with 2 heat-resistant wires. more easy to use. Just install the battery to the battery adapter and then connect the voltage converter to your device. perfect for upgrade motor, ride on toys, golf carts, car trucks, speaker, monitoring equipment, power tools, led strip light, work lights or robotics DIY etc. Wide voltage input:17V-55V output voltage:12V output current:20A power:240W Note: 1. This converter is not a charger, it only outputs the voltage and power directly from your battery. 2. When using, make sure that the positive and negative wires of the device correspond to the positive and negative wires of the adapter. 3. If not used for a long time, please be sure to remove the battery form the adapter. 4. This product set NOT include batteries Colour:Red & Silver Material:Plastic+Metal Package Contents: 1 * Adapter (built-in switch) with voltage regulator(assembled) 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.