I thought I had an issue with my battery, when the unit wasn't on the bike and been in the box for a few weeks, the battery ran down. Then I read somewhere that when you switch off the bike, and get the option to turn off the nav, it actually goes into standby, so if you put it away the battery runs down. The only way I found was to cancel the shut down, take it off the cradle and then turn it off by the button on the rear, the battery then started to hold its charge.