2012 Dodge Avenger won't start

what started opening and closing by its self?why not try and jump it off?radio and lights will work with low battery voltage,but may not crank the engine over.try jumping and see if any lights come on and stay on,like the battery light and maybe the check engine light.alternator could have went out,and drained the battery,that's when you start seeing weird gremlins,cause it's not charging,and you are running straight from the battery until it drains to nothing!do you have a volt meter?

The recent story with my 2008 Dodge Avenger: I ran a quick errand to a local store. When I came outside to leave, the car would not crank. With the key in the "on" position no lights were on the dash, the radio worked fine, ph charger charged cell. The keyless remote would lock/unlock car but would not pop trunk. The panic button worked when pressed but only stopped when pressed again. The steering wheel would not lock with key out of ignition. What I did: Place the key in the ignition Turned to "on" position Placed gear in "drive" - may stall @ 1st Turned key in ignition to crank car Viola! Car crank!! It's a prob with the wireless key entry security system. Sometimes it's not in sync with the car's security system. -Courtney