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Battery Minder for 12V System

Discussion in 'Roadster: Technical' started by CruzInVA, Aug 27, 2014.

  1. CruzInVA

    CruzInVA #1422 Silver

    Jul 20, 2014
    Vienna, VA
    Has anyone tried rigging up a battery minder or trickle charger to that lousy, constantly dying 12v battery?

    i ask because I have one I use for my motorcycles, which used to eat up batteries during long storage periods, and it works beautifully.

    The one for my bikes even has a wiring harness you a attach to the battery poles with a quick-disconnect fitting so you can plug and unplug it at will.

    i was thinking it might be possible to rig something similar up on the Roadster to allow one to plug the 12v into a tender in your garage, say, without the need to pull the front wheel off every night.

    Has anyone tried this? Is there some reason the tech experts know that this won't work/help?
  2. Doug_G

    Doug_G Lead Moderator

    Apr 2, 2010
    Ottawa, Canada
    I dunno, the battery lasts about as well as I've seen similar batteries work in other applications. The things just wear out. I suspect the car is maintaining them adequately.
  3. markwj

    markwj Moderator, Asia Pacific

    Apr 10, 2011
    Hong Kong
    I've replaced my 12V battery once in 3 1/2 years (supposedly Tesla had a bad batch which mine was a part of).
  4. spaceballs

    spaceballs Member

    Sep 17, 2013
    #4 spaceballs, Aug 27, 2014
    Last edited: Aug 27, 2014
    If you turn on your roadster once a day it shouldn't make much difference. The roadster battery is basically same as a UPS battery. UPS batteries they tend to get useless around 3-5 years for me (even when float charged).

    If you do leave roadster over extended period of time I'm pretty sure you should be able to use the 12v socket.
  5. green1

    green1 Active Member

    Mar 25, 2014
    Calgary, Alberta, Canada
    if you get 3 1/2 years out of your battery you're on par with your average vehicle battery in ICE vehicles. My work vehicles never last more than 1-2 years, my personal one is at about 5 now (and I'm shocked it's lasted this long!)

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