It wasn't long ago that so called "portable" jump starters were about as portable as 4 bricks with a handle on top. Things have changed a lot since then thanks to lithium battery technology. Indeed, this unit weighs in at around half a kilogram and could almost fit inside a shirt pocket Not only is it light and portable with a whopping 850A cranking current, it also features a wireless Qi charger for your phone and two USB sockets for your other devices. You won't be caught in the dark either thanks to the built in torch with SOS beacon function. Charging is via the onboard USB C socket. LiCoO2 Battery Reverse Polarity Protection Short Circuit Protection Low Voltage Protection Overheat Protection For More info on Jump starters Specifications DC current rating : 850.0A DC Voltage : 12.0V LED Light : true Jump Start Battery Connection : Alligator Clips Length : 193.0mm Width : 89.0mm Height : 42.0mm Weight : 560.0g Shape : Lithium Rechargeable Battery Cell/Pack Type : Lithium Ion Voltage : 3.7V Capacity : 12000.0mAh USB rechargeable : true USB Charge Connection : USB Type C USB Voltage Output Range : 5.0V, 5.0V USB Voltage Outputs : 5 USB Current Output : 2.0A, 2.1A Has USB power output? : true DG UN Number : UN3481 DG Ship Name : 3481 - Lithium Ion Batteries Packed In Equipment DG Class : 9 DG Pack Group : II - Medium Danger DG Hazardous Chemical Code : 4W Battery Watt Hour Rating (Required for Lithium Batteries) : 44.4Wh Dangerous Road Freight : false Dangerous Air Freight : true Output Power Fast Charge : 10.0W Max Charging Disctance : 10.0mm