So my boyfriend has a extension cord hooked up straight from his car battery to his power outlet in his car. Anyways we went on a road trip an I charged my samsung galaxy tablet in his car an now it won't charge at all.. theres been a little red x that has always been over the charging battery in the corner sense I got it about a year ago an it's always taken like 12 hours to charge an I can't use it while it's charging or it will just die instead of charge but thats always been normal. I've now had it charging for 4 days in my house an it's just slowly died instead of charging. An now it's competly dead on the charger an isn't saying it's charging or anything. I've tried several different chargers even the original an it's not working. Tried holding buttons an everything but nothing.. I'm pretty sure his car surged out my battery on my tablet.. What do i do?? Please help.