I'm not sure if this is the right forum, I didn't see one for electrical. I just received an engine swap OEM 2.0L 60k miles. The car started up no problem when I left shop. Every start after this point had more hesitation and eventually had no start, no crank and wouldn't even jump with another car. I brought my battery into autozone for testing, and they originally said it was good but only had 20% charge so they charged it for free, then when I picked it up they said it wouldn't hold the charge. I got a brand new Duralast battery and car still would not start. It jumped with another car no problem, then I drove it for 1.5 hours at high RPM had some alternator whine when getting up to high rpm. I got back home shut the car off then immediately turned key and it went back to no crank condition. My car also has an aftermarket sound system(amp, no sub) that has been giving me some high pitch noises for awhile now. The alternator only had about 10k on it from my old engine. Any advice is very appreciated.