2014 Cadillac ATS. DIY Battery Install
 

Hey all,
Had a DEAD car this morning. Not a single light or sign of life. As soon as I put the jumper cables on it, she woke up!
I'm not sure why it drained. It is a 4 year old vehicle, so I guess it happens, but I also had an amp and speaker box installed 6 months ago.
Do I want to try and install this battery myself, or is it too much of a pain? My local shop wants $350 for the battery & install.
Thanks,
Mike