Thank you for the tip! Bike theft is a problem here so i have made some preparations. I already have Abus and Kryptonite U-locks from my previous bikes which i will use for now. I will probably upgrade to better Abus u-lock and one of their folding locks that can be mounted in the body of the bike. I think the bike has screws for it installed at the factory. They should be between the rear wheel and seatpost. This way i can have one key for both locks and the battery lock. U-lock will travel on the rear pannier.