I don't worry about leaving my satnav plugged in as I'll never leave it on the bike unless I'm actually on it using it, If I get off the bike even to pop in the shops or when I've pulled onto my own drive & am popping in teh house for something I still take it off & stick it in my pocket. It only clips on & off & fits in a pocket nicely anyways & stops me leaving it on the bike when I plug the bike up for the night as I like to have my satnav indoors as I use it on my car as well & like to plug it in to my Laptop & sort routes out etc