NOCO Genius GB30 Boost, Lithium Ion Jump Starter is ultra-safe and mistake-proof, making battery boosting easy for anyone from professional mechanics to those with little or no technical savvy. Features spark-proof technology and reverse polarity protection. 400 peak amps suitable for single battery engines up to 6.0L in cars, trucks, boats, RVs, motorcycles, ATVs, lawn tractors and more. Can provide up to 20 jump starts on a single charge and tested at extremes of -30°C. Manual override feature even allows you boost a battery drained down to 0 volts. Recharge personal electronics such as smartphones and tablets, any time, anywhere via the built-in 2.1A USB output. Built-in ultra-bright dual LED flashlight with 7 light modes, including SOS and Emergency Strobe. High-density NOCO Element lithium-ion battery holds its charge for up to 1 year and handles over 1000 recharge cycles. Compact and lightweight so it can easily store in your car or travel with you in your backpack. Recharges in about 3 hours using the included 12V USB car charger and can also be recharged from a laptop or phone charger (not included).