Register now to get rid of these ads!

Technical Battery Story/ Food for Thought

Discussion in 'The Hokey Ass Message Board' started by wicarnut, Sep 24, 2019.

  1. Truck64
    Joined: Oct 18, 2015
    Posts: 3,960

    from Ioway

    @Hyvolt they use what are called conductance testers for automotive service or warranty now, they have the advantage the battery doesn't need to be fully charged before testing, they are standalone handheld units, it sends an AC signal through the battery. The better ones will display the remaining CCA. They seem to do a pretty good job at finding defective batts. They'd be great at sorting through a pile at a junkyard I'd think.
    Boneyard51 likes this.
  2. On cars with CPUs , is there a reason why a jumper battery should not be attached to the cable clamps before disconnecting a battery to keep power in the system while the battery is being replaced?
    BTW, on a roadtrip to the Albuquerque NSRA show last month, the internal voltage regulator in my alternator crapped out. Had O'reilly's check it, and also my battery. They told me not only was the alt. bad, but my battery failed as well. It's a 5 year old 4 post Optima. I couldn't believe that as it had given absolutly no hint of having a problem. I replaced the alternator in their parking lot, but passed on the battery. Drove home that night 5 hours in the dark with the headlights on. Next morning I checked the battery and it had 12.9 volts.
    Last edited: Oct 1, 2019
  3. theboss20
    Joined: Dec 30, 2018
    Posts: 189


    They make a memory saver to be used when swapping a battery in late model cars that is simply a 9v battery attached to clamps big enough to work with battery also saves all your pre-set radio stations and power seat positions etc. Stops a lot of headaches but isn't the answer to all things. the Mercedes issue...

    Sent from my iPad using Tapatalk
    Texas57 likes this.
  4. gene-koning
    Joined: Oct 28, 2016
    Posts: 1,684


    If the battery died in a modern car, a memory saver is probably too late to do much for you. The battery has already died and the memory has already cleared.
    I have to move my truck to mow tomorrow, I suspect I'll have to jump it again. Gene
  5. Not necessarily, a battery might not have the power to start the engine but has enough to keep memory going. The memory saver could still be used.
  6. I can't imagine too many guys are going to have a "memory Saver" battery, so back to my original question: Is there any reason a portable 12v jumper battery should not be used for the same purpose?
  7. Truck64
    Joined: Oct 18, 2015
    Posts: 3,960

    from Ioway

    An actual battery will work great, if that's what you mean. Those miniature jump-start devices may have some internal voodoo I'm not too sure about. Do they measure 12 volts at rest?
  8. I've seem ads for those new miniature devices, and like you, I have reservations. I was talking about those "full size" jumper units close to the size of a regular battery, built in handle, cables, compressor, etc. Mine is a Stanley unit.I couldn't think any problems it would cause, but since it wasn't mentioned when discussing replacing batteries/cpu memory loss, I thought maybe I was unaware of an issue. Thanks for the response. I always carry one on my roadtrips, and for sure now since the previously mentioned O'reilly's test failure. 700 mile roundtripper this weekend to "Run to the Inn of the Mountain Gods" in Ruidoso, NM. :)

Share This Page

Register now to get rid of these ads!


Copyright © 1995-2020 The Jalopy Journal: Steal our stuff, we'll kick your teeth in. Terms of Service. Privacy Policy.

Atomic Industry
Forum software by XenForo™ ©2010-2014 XenForo Ltd.