How to jump start a car ? This YESPER Portable lithium car battery jump starter provide up to 3000A peak current and 20000mAh Battery capacity.It can safely start (12-Volt) car, truck, motorcycle, boat, RV or tractor ATVs, UTVs, lawnmowers, snowmobiles, etc,up to 10.0 L gas engines and 8.0 L diesel engines,It's a mistake-proof portable car battery jump starter battery booster pack, making it safe for anyone to use, and features spark-proof technology, as well as reverse polarity protection.This battery jump starter integrates with a high-output 400 lumen LED flashlight with 3 light modes including lighting, strobe, and emergency SOS.This Portable jump starter can maintain its cost for up to one 12 months barring being recharged. This jump starter interior 2 USB ports and 1 type-c power bank to charge all your devices, like your phone, iPad and even Macbook,drone.