Not sure if I'm posting this in the right topic forum. I bought a used 91 Honda Civic Sedan a couple months ago. After a month the alternator went, so I bought that and a brand new battery and it worked perfectly fine, until two weeks later the same thing happened. The battery light turns on and less and less power is being used until it dies. I boosted it and it worked for a bit. Something is draining my battery, I'm no mechanic and it maybe an easy fix before i take it to a garage where i will be ridiculously over priced. Any ideas?

 

Pull both out and get them tested