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    Overcharge caused by overvoltage. The only I know of that causes an
    explosion like that is hydrogen gas caused by overcharging along
    with a source of ignition. That's why it is now recommended to
    ground to the chassis, instead of the neg. terminal, when jump
    starting. Note even 'maintenance free' batteries have vents. <br>
    <br>
    I ruined a battery on an 'old school trickle' charger; they are
    constant current power supplies and will keep pumping electrons even
    after the battery if fully charged. The newer smart chargers know
    when to stop.<br>
    <br>
    bs<br>
    <br>
    <div class="moz-cite-prefix">On 7/3/2026 9:08 PM, Al Fuller wrote:<br>
    </div>
    <blockquote type="cite"
cite="mid:CADkpZwGmSssh=xb4Zn=Vx9wcv8z7VcvJVvPc22Vphsv78JEtSQ@mail.gmail.com">
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        <div>Hard to think of anything better, but where the run off
          will go is a consideration.</div>
        <div dir="auto"><br>
        </div>
        <div dir="auto">I guess it goes without saying that careful PPE
          is called for.</div>
        <div dir="auto"><br>
        </div>
        <div dir="auto">What is causing the batteries to go? Overcharge?
          Overvoltage? Short circuit?</div>
        <div dir="auto"><br>
        </div>
        <div dir="auto">Something as dangerous as multiple batteries
          going off calls for some serious investigation and root cause
          analysis.</div>
        <div><br>
        </div>
        <div data-smartmail="gmail_signature">________________<br>
          Sent from my phone <br>
          Best Regards,<br>
          Al Fuller</div>
      </div>
      <br>
      <div class="gmail_quote gmail_quote_container">
        <div dir="ltr" class="gmail_attr">On Fri, Jul 3, 2026, 7:49 PM
          john niolon <<a href="mailto:jniolon@att.net"
            moz-do-not-send="true" class="moz-txt-link-freetext">jniolon@att.net</a>>
          wrote:<br>
        </div>
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style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
          <div>
            <div><font face="Segoe UI">had my second Walmart Neverstart
                battery explode in my generator.....</font></div>
            <div> </div>
            <div><font face="Segoe UI">what's the best clean up material
                for this   Soda wash??</font></div>
            <div> </div>
            <div><font face="Segoe UI">john<img
                  style="HEIGHT:2175px;WIDTH:1352px" border="0"
                  hspace="0" alt=""
                  src="cid:part1.1m9hZS5h.XxQ0C0LV@comcast.net"
                  width="2140" align="baseline" height="2853" class=""></font></div>
          </div>
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      <pre wrap="" class="moz-quote-pre">_______________________________________________

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