no power on 2009 Subaru Outback

the car has no power at all. turn key an nothing happens .the lock & unlock on key doesn't work .car wont start , no lights basicaly the car just shut down. it worked fine last time it was driven.

Asked by for the 2009 Subaru Outback
Check to make sure the battery cables are not loose, tighten if they are. It may be a dead battery, so make sure the lights were not left on. You'll need to have the battery checked, and after charging the battery, an amperage draw test will need to be performed to see if something is causing the battery to go dead.
Let us know what you find out!