I am sure I read, or was told, that completely removing a battery from a car is bad because it resets things in the car's computer or it dumps some sort of acquired tuning data, or something along those approximate lines. I cannot recall or find the information again though.
My car (Jaguar S-type Petrol 3 litre, 2000) has been sat unused for about 3 weeks, and today I discovered that it will be another 3 weeks before it can go in for some much needed work. I don't want to drive it with work needed (some of it mildly safety related) until the short journey to the mechanics garage, so I am thinking a few days before I will take the battery out and charge it overnight (the battery in my car does not respond well to being left for long periods without being driven)
So I am wondering if there will be any issues with the battery not being in the car.