I have a Nolan 103 with the n-com bluetooth set-up. I am paired to my wife's identical helmet and connected via wire to my zumo. Because I ride with ear plugs, I need to have the volume at max to get a satisfactory sound level. Under these circumstances my battery goes t/u after two and a half hours. Wife's is okay after three, but don't know how far it will go as we have yet to take a long trip. Any one having any better experience? Thought it would be good to get some input before I contact the Nolan distributor.