Perfect for helping you out in an emergency, the Energizer 12v 9000mAh Lithium Polymer Car Jump Starter is quick and easy to use. Compact, lightweight and portable you can use it on cars up to 3.0L Diesel and 4.0L Petrol engines. The cross polarity safety feature protects you against short circuiting. It features a 2.1 AMP USB output socket for charging phones, tablets etc and recharges from a 12v vehicle socket or USB port. Suitable for petrol engines up to 4000cc and diesel engines up to 3000cc. LED status indicators. Heavy duty booster cable length of 0.25m. Built-in light. 400 amp booster current to assist engine starting. Requires full charge before use. Accessories included: 12V DC rechargeable portable power station. USB power socket.