Charging/Alternator

[cali_surfer]

I need some help here guys, I'm frustrated. A couple weeks ago I blew the alternator on my truck and the red top optima battery I have discharged quite a bit, low 11/upper 10 volt range. Battery tested fine at AutoZone, so I charged the battery, put on a new alternator and thought all was well. Battery never fully charged once on the truck however....... I thought that was odd. Drove it tonite and I blew the alternator again. Reason I could tell is that there was a strong electric smell all of the sudden. Put my volt meter on the battery while running and sure enough no charging from the alternator, registered 12.00-.05 when it should be in the 13 range. Is this just a case of bad alternators or can something else cause this to happen? These are life-time warranty rebuilds from Kragen. This is starting to piss me off.