Universal Laptop Power Adapter The Kerio Energy Knight Universal Power Adapter allows laptop users to use and recharge their notebooks using either a car s cigar lighter socket or the Empower socket provided im most aeroplanes. The digital device is the safest and the most convenient way to recharge notebooks on the move and is recommended over the traditional analogue devices supplied as original equipment. It is the smallest and lightest car air charger on the market weighing only 139g. The cord length is four feet and adapts to virtually all Notebook models. It features voltage adjustment and a number of different connectors so it can be configured to suit virtually any major and many lesser known brands of laptop computers.