OEM replacement battery for Jump-N-Carry jump starter models JNC300XL and JNC300XLC. Includes battery hardware and instructions. Note: The are many batteries sold as replacement batteries for Jump-N-Carry jump starters. Not all batteries are created equal, even if they match in size. If you wish to experience Jump-N-Carry performance, your jump starter needs to have a Jump-N-Carry battery. It's that simple.