Can someone help me figure out y my battery is swelling up in my car? I had an old battery with hids and a system hooked up to it.when I step on the gas my radio shut off. And when I turned the car on my hids shut off. If the car is off my hids and radio work. Soi got a new duralast gold and it did the same. So I took out the system and hids and my battery is swelling and the caps pop off. What could cause this?

 

Have your alternator tested?

 

that sounds crazy....i would say something is grounding out...or maybe alt is over charging the system...pull it and take it to local auto zone/advance and test it out

 

x2

 

Check the voltage regulator. Your system is overcharging.