Years ago, when I got to work I noticed another car in the parking lot with its lights on. I called
our security office to have them locate and notify the owner. One of my coworkers overheard,
and said that he *never* tells anyone they left their lights on. Says he's being more helpful that
way. How do you figure that, I asked him. He asked me "Did you ever leave your lights on,
and come back to a car with a dead battery?" Well, yes, of course, but -- "Did you ever do it
I guess some people don't learn as quickly as others.
Have relay installed to turn lights off when ignition is off
REPLACE the existing battery its been damaged by deep discharge, espically repeated deep discharges!
I replce my vehicle batteries every 3 years and buy only premium batteries.
since doing this alternator replacements are very unusual. The added work of charging batteries in poor condition and deep discharges! damages alternators
The cost of replacement every 3 years is actually pretty low, plus I give the still OK replaced batteries to a buddy with a 12 volt windmill system
On Monday, June 30, 2014 10:35:12 AM UTC-4, bob haller wrote:
I think that's a little extreme. She hasn't said how
many times she's drained it, just that it's not the first time.
Starting batteries are not made to *routinely* deep discharge,
but IDK that just because you did it a few times, or even 10
times, means you should chuck the battery. If you're doing it
frequently, it's the primary usage for the battery, etc, then it's
a different story.
I get 6 years from batteries and alternator replacements are also unusual.
I think I had one alternator go in 35 years. And that one was in a company car
that was less than 3 years old, less than 60K miles.
It's funny they have more battery problems in the South than up here in
cold Canuck land, it seems. I just replace at first sign of battery
trouble which is usually around 5 year mark. 3 year seems to be too
Since coming into alternator age from generator, I don't recall having
too many battery/charging problems in various cars, trucks I have driven.
idle" speed - unlike generators with about 5%. 20 minutes of idling
will put enough charge into a battery to restart the engine, but a
FULL charge takes over an hour of running.( in some cases, from dead,
over 2 hours)
On Mon, 30 Jun 2014 07:42:09 -0400, Stormin Mormon
the life of the battery. So do it twice, you are down to 1/4 life.
This was particularly true of the Delco "freedom battery" which was,
if I remember correctly, a high calcium battery. Today's batteries may
be slightly better (or worse).
On 06/30/2014 10:40 AM, firstname.lastname@example.org wrote:
A "lead-calcium" battery has very poor "deep discharge"
characteristics but it's not quite that bad.
Over-discharging it a few times won't take too much life out of it...but
if it occurs frequently the life will be significantly shortened.
that I buy 5 or 6 years old (sometimes more) and drive for another
6-12 years. I have only replaced the alternator on ONE vehicle (90
ford Aerostar) in the last 30 years (owning minimum of 2 vehicles at a
time) and many of my vehicles have gone over 240,000km. Current pickup
truck is 18 years old, 324,000km, still on original alternator.
Over the years I HAVE replaced the brushes on the odd alternator - but
that wear occurs regardless of battery condition. You may note, only
ONE of my vehicles was a GM and I only owned it for about 96000km. GM
had a lot of temperature related failures with theire little SI
On 06/30/2014 10:50 AM, email@example.com wrote:
On my '59 Triumph, the generator brushes would only last about ten years.
Every ten years, yep I'd have to replace them again.
After about the third time I just got tired of all that silliness and
sold it to some sucker.
On Mon, 30 Jun 2014 10:53:52 -0700 (PDT), Higgs Boson
Just remember to turn the lights off - and don't leave the glove box
door open, or anything else that leaves lights on.. Mild discharging
of the battery is not detrimental - but deep discharge is. A good half
hour highway drive every month never hurt ANY car though - gets all
the fluids warmed up, cooks out condensation - lots of good effects.
Including fully charging (and equalizing) the battery.
On 6/30/2014 2:07 PM, firstname.lastname@example.org wrote:
I was thinking of heating the condensate out of the
I had a car one time, that the one side was about two
inches lower. The mechanic wanted to replace a spring,
but it turns out the battery wasn't equalized. (I'm
having fun, and teasing.)
years back, as well as in many battery service publications.
depth of discharge giving 1400 recharge cycles, A 50% DOD giving about
450 cycles, and 100% DOD less than 200 for a normal (not deap
discharge) lead acid battery.
This is FACT.
Lots of good information in a DOE publication by
John A. Yoder
U.S. Department of Energy
19901 Germantown Road
Germantown, MD 20874-1290
Phone (301) 903-5650
Facsimile (301) 903-6172
Available at energy.gov/sites/prod/files/2013/06/f2/hdbk1084.pdf
Those numbers look realistic.
The original statement implied that the battery would only survive four
such discharges...that's not at all true...
however "calcium" batteries are definitely not designed for deep discharge.
I don't think I ever had a car with a generator, all alternators. The only
alternator I replaced was on an old Dodge Ram 50. I seldom drove it and
about half the time I had to charge the battery up because it sat so long.
Most batteries seem to last for 5 years or more in my cars.
The only battery I had problems with was a riding lawn mower. An 8 HP motor
and I used it about an hour each time I mowed the grass. If I got 2 seasons
out of it I was lucky.
This is in the middle of North Carolina.
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