Never charge your battery while it's connected to the car.
Should we put a sticky up, so people are aware of this?
If it's so important, though, why aren't there big stickers and warnings all over the place about it? Particularly in the engine bay near the battery.
Surely in this day and age of litigation, Alfa could be sued for damage caused by incorrectly charging the battery, because they didn't make it clear enough that you should disconnect the battery first?
Especially when a woman can sue for putting her dog in the microwave, or McDonalds can be sued for supplying hot coffee without a warning saying that it might be hot, and that you shouldn't try wearing it.
Luckily, nothing got damaged when I did it.