Again, IMHO, if you don't maintain the battery, i.e. throw a trickle charge in it periodically, If you do allow it to get discharged (maybe leave the dome light on), don't rely on the alternator to bring it back up - it won't! Fully charge it again with a charger, then throw a trickle charge in it maybe once a Month. Heat will kill a battery if it's not maintained properly too. Keep all of your cables clean and inspect for corrosion on connections, including grounds all over.
Any battery will live longer if you take care of it.