Sure, I also disconnect mine in those cases. Nevertheless, the Motobatt I mentioned is gone now. It still had 12,4V but not enough power to start the bike. Probably due to some issues a couple of months ago: one of the contacts had burned and melted which obviously caused internal problems for the battery. In case you will get a Motobatt battery at one point in the future be aware: the contacts need to be installed manually and have to be very tight. Otherwise they might burn the battery.