This amazingly small and lightweight portable lithium - ion power bank with inbuilt torch weights only 500g (without leads). It will jump start a flat car battery making it perfect for emergency situations. In addition it provides USB 5V device charging for mobile phones, cameras etc. plus 12V accessory and 19V laptop computer power outputs. An ideal device to keep in your vehicle. Includes vehicle aux power outlet (cigarette lighter) and mains chargers. Very compact and lightweight: 220x90x30mm / 1.37kg Includes vehicle aux power outlet (cigarette lighter) and mains chargers. Very compact and lightweight: 220x90x30mm / 1.37 Selectable 12V/10A and 19V/3.5A dc outputs with 8 adaptor plugs for use with laptop computers and other devices/accessories. Lithium ion batteries with very low charge cycle requiring only approx 9 hour monthly recharge if not used

For our starting test, each device had to assist an ailing battery on a 1.6-litre petrol engine, turning it over five times for five seconds, with two minutes in between attempts. The JSM400 Jumpstarter is supplied with a zip fastening bag, AC battery charger, smart charging cable, switch cable, 3 way USb cable, car charger adapter and 8x notebook adaptors. Includes vehicle aux power outlet (cigarette lighter) and mains chargers. Supplied in convenient zipped storage bag Lithium-ion batteries with very low charge cycle requiring only approx 6 monthly recharge if not used.Selectable 12V/10A and 19V/3.5A dc outputs with 8 adaptor plugs for use with laptop computers and other devices/accessories Lithium ion batteries with very low charge cycle requiring only approx 6monthly recharge if not used USB output with 4-way device adaptor cable; including iPhone Lightning, USB C and Micro USB outputs to suit most mobile phone connectors