I picked up my SC300a few months ago, since then I’ve connected all the vacuum lines, then the wheel bearing,I put 18 inch rims on my car and it did rub at some of the harness before I noticed but that is not the issue because when it’s jumping it runs fine, but right now my battery so low I can’t even drive it to go get everything checked but I replace the alternator because my ABS light and stuff came on randomly and then I got my battery charged installed it everything is plugged in and it still didn’t hold a charge, so then I did the big three upgrade and it’s still not holding a charge

 

How long does it take to drain the battery? These cars do have a tendency to have a bit of a battery draw.

 

The first time when the battery’s at 100% I drove approximately 15 miles and then when I took off I got another 3 miles in before it died or started to at least also my battery indicator is out on my dash

 

It sounds like you need to check the alternator just to make sure you didn't get a dud.