Battery keeps draining

If the new alt. had to charge a dead batt that may have killed it , the new alt. may be a rebuilt P.O.S. , you need a multi meter to know what's actually going on . It may be a parasitic drain , either way you'll need some testing equipment

could be the batt. terminals , this guy had the same problem , the OEM terminals suck and don't really tighten , he used a regular clamp batt. terminal with a wing nut on it , drilled a hole in the OEM one and hasn't had a problem since

Thanks I appreciate the advice!