Alternator and/or Voltage Regulator Issue? - Page 3 - TerrainForum.net: GMC Terrain Forum
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post #21 of 24 (permalink) Old 05-28-2019, 06:59 PM
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I'm 70 yrs old and have always used AC-Delco batteries exclusively for well over 50 yrs, except for a Die-Hard camper battery in a slide-in. They've served me well over the years, never have had to replace one under 5 years, have got as long as 10 years out of one. Last one I bought was a 7 yr group 78, I think around 800 CCA at a dealer for $130, but that was 3 yrs. ago. So unless I get stung on one I'll stick with them. But a lot of battery dependability depends on owner maintenance, a trickle charge every once in awhile on a seldom driven or short mileage driven vehicle sure doesn't hurt any battery brand.
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post #22 of 24 (permalink) Old 05-28-2019, 09:34 PM
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Originally Posted by garagerog View Post
I'm 70 yrs old and have always used AC-Delco batteries exclusively for well over 50 yrs, except for a Die-Hard camper battery in a slide-in. They've served me well over the years, never have had to replace one under 5 years, have got as long as 10 years out of one. Last one I bought was a 7 yr group 78, I think around 800 CCA at a dealer for $130, but that was 3 yrs. ago. So unless I get stung on one I'll stick with them. But a lot of battery dependability depends on owner maintenance, a trickle charge every once in awhile on a seldom driven or short mileage driven vehicle sure doesn't hurt any battery brand.
The Nox had the original AC Delco battery in it, when I tried the EverStart(s). The date code was was 5/2012.
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post #23 of 24 (permalink) Old 05-28-2019, 10:05 PM
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Originally Posted by c&wsinbad View Post
sydnesb---I "killed" a battery several years ago in a '14 Malibu by listening to the radio while parked in a cell phone lot at the airport. Normally, I would do that after turning the ignition key "off" and let "retained accessory power" keep the radio working. However, this particular day I turned engine off and then turned key back to "on" position without starting engine. Twenty-five minutes later and the battery wouldn't start the car; just click, click of the solenoid. Called for airport service (Orlando Intl provides good service in that regard); tech showed up about 25 minutes later and I explained to him. He asked that I give it "one" more try before he charged me for service. Fortunately, the 25 minutes was sufficient for the battery to recover enough to start the car. I didn't turn it off until we got to Cape Canaveral, which allowed battery to charge sufficiently. However, I had weakened the battery enough that two weeks later it succumbed completely. Two years old; dealer replaced--but it was my error that lead to early demise.
I have used EverStart for years, with no problems. 3-4 times each summer I would take the kiddos to the drive-in theatre and play the radio for 3 hours for a double matinee with no problems. If the battery is discharging after 20-25 minutes of use, to the point it will not engage the starter solenoid, the battery is already short on life.
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post #24 of 24 (permalink) Old 05-28-2019, 10:27 PM
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Originally Posted by repairman54 View Post
Vehicle only puts a fast shallow charge into the battery to replenish the starting loss and doesn't give it a full deep charge like a battery charger does. On my Tahoe and the multiple Express vans I've driven over the years you'll see the V meter stay above or at 14 for a long time and only after several hours of running will it finally drop down below 14v. A battery in good shape will drop the V meter lower faster.
Yeah I remember those days. I made the mistake of buying cheap re manufactured alternators, I was young and poor, leaving me stranded. I lost one while driving through Denver, watched the V meter drop to 12v, and knowing I had about 10 miles before the ignition system would die. Ended up on Colfax Av, in the middle of winter, in the dark, not a nice place to be, but within a block of a parts store. In previous years, the voltage regulator in the alternator was the sole control over battery charging and supplying voltage to the car. In those situations external charging was needed sometimes.

Newer cars have complex battery charging modes, that monitor state of charge, current in/out of the battery, and even temperature of the battery. They are capable of trickle charging, float, bulk charging, and even equalization of battery cells to help prevent sulfation. Some cars you have to tell the BCM when you change the battery, and if you put a different capacity of battery, or switch from flooded or AGM. This is all to maximize battery life, because we know how polluting those batteries are. I miss my 1970 F250.
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