MMmm interesting debate however, it takes around 10minutes to put back into a battery what you take out at startup, plus at this time of year with lights, heated front and rear screens, heaters fans it is a significant drain on battery power and repeated stop starts have a significant effect on battery levels. But that said a good trip of say 30 minutes or more in a modern car does recharge most batteries to a near normal capacity. The starting from cold and driving off depends how you view maintenance costs, even with modern synthetic oils a turbocharged car will benefit greatly from a short idle period before pulling off and you can significantly extend the life of the turbo by idling for some 2 or so minutes before shutting off the engine as this allows the oil to cool the bearings around the turbo. KjF