The GOOLOO GP4000 is a portable and powerful device that combines three different products, a backup power bank, a car jump starter, and an LED work light. The product is compact and can be easily placed in a pocket or stored in a glove box. Do not waste your money buying these other devices separately, instead just buy the GOOLOO.<br><br> <b>4000A Peak Current, 99.2Wh High Capacity, All Gas and up to 10L Diesel </b><br> The GOOLOO Supersafe Lithium Polymer jump pack GP4000 can boost all gas engine and up to 10L diesel engine. After a full charge( 5-9 hours ), it can work up to 30 times for vehicles, motorcycles, trucks, boats and more. <br><br> <b>Portable Power Bank with Quick Charge 3.0 port </b><br> Dual USB Ports with Quick Charge & 5V 2.1A -- Ensures the fastest charging efficiency, 4x faster than conventional charger. Backward compatible with QC 1.0 and 2.0<br><br> <b>15V/10A DC Output </b>- It works as a compact portable 15V/10A(max) DC power source for 12V DC devices, such as tire inflator, car refrigerator cooler, car vacuum cleaner and so on. ( 12v cigarette lighter socket adaptor not include). <br><br><b>Bright LED Work Light</b> - The LED light has three modes: Flash light, Strobe light and SOS light. It can help you In any situation especially for adventure, outdoor, indoor, emergency, travel, etc. <br><br><b>Super Security & Ruggedness Jumper Cable</b> - The GP4000 Smart Jumper Cable are constructed with all-metal clamps to prevent breakage caused by long-term use. And it has 8 protections, including overcurrent protection, overload protection, overvoltage protection and overcharge protection, making it totally safe for anyone to use