Hi,
I just went out and put 4 12v batteries in series with an ammeter with high and very low ranges on it. Â
There were just a couple of microamps of current across it.  Then I took a small bottled acetylene torch to it at five inches and the current did not change much when held there for three minutes.  I did not try to burn it and it did not, but it stretched and started a slow curl, melting.
I am an electronic engineer with atomic physics background and do not claim to be the last word, however there was something quite different that caused that unit to fire off. Â Something shorted the two terminals on the battery and it had to be outside of the cover, I believe, and the total battery was shorted by touching the voltage connections, wires or some other part, somewhere back behind and away from the battery as the only straight forward possibility. Â Even grease, corrosion, water, or acid would not fire it off. Â Sulfuric acid being the worst. Â Common sense says that folks.
There has to be another answer.
Paul N. Risinger
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6V Optiva Battery Cover
- Jim Breazeale
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