Hey guys, so after completing my rebuild with a mhg and arp studs and fixing/cleaning up miscellaneous things, I went to start my car with my old battery that had been sitting for almost a year. Sure enough battery was toast, I was able to get some power when I hooked up a booster but that soon died. This was yesterday. I hooked up the battery from my daily driver that I knew had power, and I noticed that when I opened my door it was ad if there was no power since my door light didn't come on, but right as I sat in the car it came on? Then today, I went out and bought a new battery for the supra, and right away my car has power and it starts up. I let the car warm up, took it literally 1 min around the block for a little spin, come back and shut the car off. As soon as I shut the car off my car had no power again so I try cleaning up the terminals and still nothing :s I can't figure out what it could be cause there's no way the battery is dead already, and I checked the wires on my alternator and everything seems fine. Some help would be appreciated!!