The assist in starting jump charger is compatible with Makita 18V batteries BL1830, BL1840, BL1850, BL1860 series (Battery not included). Designed for jump starting 12V car batteries using compatible tool batteries. Includes 11-gauge booster battery jumper cables for jump starting dead or weak batteries. Suitable for trucks, SUVs, full-size, mid-size, and compact cars. Instructions for Use: 1. Connect the red clamp of the jumper cable to the positive terminal (+) of the vehicle battery and the black clamp to the negative terminal (-). 2. Insert the compatible 18V battery into the adapter and ensure it is securely locked in place. 3. Attempt to start the vehicle. 4. Disconnect the cables from the battery after the engine starts. Equipped with heavy-duty alligator clamps featuring strong teeth and springs for secure grip and reliable connection. Jaws provide solid contact and easy attachment. Jumper cables include insulated handles to help prevent electric shock and enhance user safety. The design includes non-conductive rubber and a dual-grip structure for improved conductivity, tension control, and secure handling. Compatible with top-post and side-terminal 12-volt batteries. 11-gauge, heavy-duty cable resists tangling. Ideal for use with mid-size cars, light pickup trucks, and light recreational vehicles. This product is an adapter only; battery not included. Product appearance may vary slightly due to different production batches, including label or printing variations, which do not affect functionality. Color may vary slightly due to lighting and screen display differences. Color: As shown in picture Material: ABS Package Contents: 1 x Car Jump Starter Adapter Note: Only the items listed are included. Actual product color may vary slightly due to lighting and display settings. Measurement may vary by +/- 1-3 cm.