Compatible with Multiple Devices: The WILD BADGER POWER 20V 4.0Ah Lithium Ion battery works seamlessly with all 20V 4.0Ah tools from WILD BADGER POWER Quick and Easy Installation: Effortlessly switch between tools with this user-friendly, hassle-free battery system. Clear Battery Status Monitoring: LED lights provide real-time charging progress updates, ensuring easy monitoring of the battery status. Long-Lasting and Lightweight Design: Minimal self-discharge maximizes productivity and runtime, while the lightweight build enhances portability. High Performance Output: Delivers a stable and high power output, enabling tools to operate at their peak performance.