This XS power battery is one of the best upgrades I have done for my car audio system. There's really only one issue I have with the battery, and that is the size of the terminals, they're about half the size of your standard side post battery, which is a 4 mm with .7 pitch threads. The overall size of the battery is about 6 and 1/2 in wide, almost 7 in tall, and about 5 in thick, and with my car it mounts on its side. And just for reference my car is a 2006 Chevy Malibu SS. It's possible I could have got a larger battery, but I did not want to modify my battery box or the cover for the battery box. This battery was a kit and it came with the mounting plates. My car audio system pulls between 180 up to 230 amps. And since upgrading the battery, I don't see my voltage drop below 13.6 volts when I have it cranked. Before with the old battery, I could get the voltage below 12 volts, but the battery was a couple years old. So far I couldn't be More happy with the performance of the product