Battery Solar Panel?

Hey. I've seen these solar panels at radio shack for like 20 bux. It says it prevents dead batteries. Do you guys know if that means I can like sit outside with the car turned off and listen to the radio without draining my battery? I'm hopin so. Cuz I can never leave me radio on for too long because of that. What can I do to keep my battery charged while playing the radio other then turnin the car on?

It's a trickle-down charger, usually used on RV's and stuff... You will still drain your battery if you turn it off and listen to your radio for a long time, but it will recharge itself enough to start after a couple of hours...

Is there anything else to do that can keep my battery charged? Cuz I know people jut play their radio at like shows or bass offs or somehtin. How do they keep it from dyin?

they have 1 or more additional "stereo" batteries, the main battery is protected thru an isolator. No matter how badly you discharge the stereo batteries - it does not affect the car battery.

thanx