Battery Meltdown

Discussion in 'Sportster Models' started by mfaitak, Mar 18, 2009.

  1. mfaitak

    mfaitak Member

    Anyone ever heard of a battery doing a meltdown? My friend has an '06 sporty and was charging the battery. The 'tender said the battery was good so he unhooked it. Tried to start but nothing. When he went to check the battery he noticed what looked like solder all around. When he got to the battery the solder turned out to be the negative terminal - it had melted off. Somebody told him that if one of the plates inside the battery touches another plate it can go into some kind of hyper mode (?). He got another battery and everything is good so far. He's getting ready for a ride and doesn't want to get stranded. Anybody got any clues? Oh, yeah he checked out the battery tender on his boat battery for a couple of days and everything is fine with it. Also checked it with a meter and it's putting out what it should.
  2. glider

    glider Veteran Member

    I've seen this only once where the terminal had melted off the battery. IMO it was probably caused by a bad connection on the battery terminal. With the draw of the starter and a bad connection, it causes excessive heat and when enough heat is generated over time it will melt the terminal.
  3. Bud White

    Bud White Well-Known Member Retired Moderators

    seen it plenty of times in other stuff as glider says is uaullay a bad connection .. but also a dead short can do it
  4. STEVE07

    STEVE07 Well-Known Member Staff Member Super Moderators

    If a battery is dropped or hit it can cause the plates to short and sometimes create a surge in voltage before it dies,or the acid blows out of it
  5. hjacobson1

    hjacobson1 Active Member

    Like Glider, I have only seen this result when a connection was loose.

    Generally the loose connection causes a dramatic increase in resistance (read heat) and something has to give.

    Be sure to have your friend check all the electrical connections, chances are if one was loose, there will be another loose.

    Safe Riding

  6. gs34

    gs34 Junior Member

    There is a condition called "THERMAL RUNAWAY", which is normally associated with NiCad batteries, but it can also be associated with lead acid type.
    If anyone cares to do a Google search, there is enough information on the condition to keep you reading for days.
  7. krikket

    krikket Active Member

    I came across it once when I was working on cars. This guy's car wouldn't start so he got it towed in. Battery voltage was 0. Not knowing what the cause was, we put in a new battery. Got the first terminal on and tight. As I touched the other cable to the battery it sparked, the cable got super hot and as I tried to hit it off the post, the whole post came out in this molten leady mass. Further investigation revealed a cracked starter which caused a dead short.
  8. opaka lips

    opaka lips Member

    No doubt about it. This is obviously the Holy Grail as far as battery problems go--amen!