Car unlocks itself

[AlvaSpeed]

I lock the car and after and after a while the car unlocks by itself.
Also tha battery looses its charge.
The alternator is charging properly.
What is it?

 

[V10SpeedLuvr]

Replace the battery, Vipers get really stupid when batteries get low or have a dead cell

 

[Ulysses]

Battery.

 

[AlvaSpeed]

What battery do you reccomend? specs??

 

[Flash Gordon]

I just replaced my battery with a Sears Die Hard, 78 Series w/side posts. Paid about $85.00 after a $10.00 credit for returning the old battery. Fit was perfect. My Mopar battery only lasted 3 years...