I have to replace the alternator and/or voltage regulator about every three months in my trucks. I have several Dodge Rams and a Ramcharger that I drive. This has happened ever since I bought them and I have had two of them since they were new (1984 and 1986). I used to drive a few Chevys and the alternators would go bad on them in about 2-3 months time. I do not use any extras that would be putting a strain on the electrical system. I do not drive that much at night or need the lights very often. I do not pull trailers very often either. So, what do you all think is going on with the alternators and voltage regulators? One more thing, I never 'jump start' other vehicles either.