All car batteries lose power over time. This isn’t a factor when the car is driven regularly, allowing the alternator to replenish the battery. But if the car is parked for an extended period, such as ...

My Porsche 944 S2 Driver's Manual states: "Prior to charging the battery with a 'Quick Charger', disconnect the battery to prevent destruction of the alternator". As I only use the car infrequently, ...