The CAT professional booster pack jump starter is built tough and rugged, featuring 1000 instant starting amp and 2000 peak amps of boosting power suitable for starting most 12V vehicles. The heavy-duty AGM technology internal battery offers superior cold-weather performance, and the built-in 2-amp charger recharges the internal battery and can be left connected without risk of overcharging. The 12V DC power outlet provides portable power for phones, tablets and small AC power inverter.