Hello, I recently bought a new OEM amp and once I installed it, my car battery died a few days later. I thought it maybe was the battery itself gone bad (it was only a few months old) and I went to AutoZone to get a new one for free. Both of the batteries are smaller than the one in the car before. Both of the new batteries are around 640A CCA and 800A CA.

My old AMP was broken it made crackling noises and stuff, so I went on eBay to get a new one, this one works but I'm not sure if it's causing my battery to drain. I also use a small Bluetooth transceiver to play music off my Spotify that's connected to the center counsel cigarette port.

Does anyone have any ideas?