COMPATIBLE WITH THE BLACK+DECKER 20V MAX POWERCONNECT RANGE of cleaning, lifestyle, DIY and outdoor cordless products to help you conquer your to-do list THE RIGHT BATTERY FOR THE RIGHT PROJECTS: This 4.0Ah POWERCONNECT battery runtime is ideal for extended use of cordless saws, sanders, hedge trimmers, string trimmers, leaf blowers and more. For quicker tasks, consider a compact 1.5AH or 2.0AH battery (sold separately) HIGH QUALITY LITHIUM-ION CELLS: Deliver reliable power SELF-REGULATING TECHNOLOGY FOR LASTING PERFORMANCE: Monitors voltage and temperature to protect against overloading and extend battery life. SECURE, EASY RELEASE LATCH: Makes swapping the battery between tools easy