Well if someone thinks the main steering lock is enough I must say its not but sure does keep away most mindless beings.
Learn more about it by reading or watching videos and you'll be amazed how small things can make it hard for a thief to mess with your bike.
Stickers can work pretty well don't they?
Sorry, I didn't know about it in NL.
Still there can be something done. Some kind of lock protecting the battery from being take out even if the tank-lid is open.
In the TC model and possibly also the TS and TSX the original battery pack is already locked in place, but there is no provision for the second battery to be locked in as well.