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 a power tool battery. Features 11-gauge booster battery jumper cables for reliable performance when jump starting a dead or weak battery. 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. After successful engine start, disconnect the jumper cables from the battery terminals. Equipped with heavy-duty alligator clamps featuring strong jagged teeth and springs for superior grip and secure connection. Jaws are designed for easy attachment and reliable contact. Includes insulated handles to help prevent electric shock and enhance user safety. The non-conductive rubber housing and dual-grip design provide improved conductivity, tension control, and secure handling. Compatible with top-post and side-terminal 12V batteries. 11-gauge heavy-duty cable resists tangling and delivers durable performance. Ideal for use with mid-size cars, light pickup trucks, and light recreational vehicles. Note: This product is an adapter only and does not include a battery. Product appearance may vary slightly due to different production batches, including variations in labeling or printing, which do not affect functionality. Color may vary slightly due to lighting and display differences. Measurement tolerance is +/- 1-3 cm. Color: As shown in photo Material: ABS Package Contents: 1 x Car Jump Starter Adapter Note: Other items shown in images are not included.