The Charegr Jump Cable Adapter is a 12V auto battery booster that runs off Milwaukee M18 18V lithium-ion batteries. It is compatible with Milwaukee M18 batteries including 48-11-1820, 48-11-1822, 48-11-1840, 48-11-1850, 48-11-1852, 48-11-1860, 48-11-1862 and other 18V Milwaukee M18 batteries. Battery not included. Newly upgraded jump starter designed to work only with Milwaukee batteries. Easy to use: move the power adapter into the groove, then push the converter and make sure it has locked the battery. Suitable for outdoor travel, camping and other activities. Battery not included. How to use 1. Connect the 18V/20V battery, the green light will turn on, then connect to the positive and negative terminals of the car battery (12V system only). 2. When the starter light is green, start the car (or wait 3-5 minutes for charging). 3. After starting the car, remove the starter from the car battery and let the engine run. 4. After use, remove the battery from the starter. Engine compatibility - Engine size: suitable for engines under 3.5 liters. Clamps and safety - Strong, safe clamps: two large alligator jaws with jagged teeth and springs for excellent grip. - Jaws stay strong for reliable connections. - Insulated handles reduce the risk of electric shock and protect user safety. Battery not included. This device provides a portable jump-start option using Milwaukee M18 batteries for 12V vehicles.