Quote:don't worry about battery drain as you take the unit off when you leave the bike so no power drainYou cannot generalize that. I have measured the cradle of my Zumo 660 and of my Zumo 500 without nav.
With the 500 cradle the reading was 0 but with the 660 cradle 72,5 mA. Somtimes older stuff is better

Guenter