The Carlyle Tools 12/24V Jump Starter, No. CJS24V850A, is ideal for automotive, diesel, heavy duty, marine, and agricultural repair operations. It delivers up to 3,400 peak amps and 850 cranking amps of jump starting power. The power delivery of the jump starter comes from its dual, high-performance AGM batteries. It has a built-in automatic charger that can provide up to 24-hour / 365-day continuous charging, with no danger of overcharging. It also includes dual USB outlets (USB-C and USB-A) to power small electronics. A 12V DC outlet allows use as a memory saver or to power 12V accessories.