It equals to 24Ah lead battery, so it actually has a bigger capacity than the AGM battery(16Ah) I had even the weight is 6kg less. Lead acid batteries tend to lose cranking amps in cold, but lithium battery’s cranking power will not drop-off. It also has a microprocessor Battery Management System that monitors the charge level of each cell and balances the charge when needed. Without BMS you can't use lithium batteries in cars, because alternators aren't smart chargers.
Lets say the car uses ~150watts with all the lights on(headlights, parking lights, rear lights) and thereon will drain around 12.5amps(150w/12v=12.5), so the battery should last ~2hours in theory.