The battery is supposed to last 18 hours when the device is on, and 36 days when off. It charges quickly over USB. After I zip it up, I do have to remember to f

The battery is supposed to last 18 hours when the device is on, and 36 days when off. It charges quickly over USB. After I zip it up, I do have to remember to fasten a button to turn it on. It would be nice if it alerted me with a periodic beep or something when it was zipped up but not buttoned. Bicycle helmets in general are not supposed to be re-used after a crash; a Hovding is no exception.