"BillW50" <BillW50@aol.kom> wrote in message
news:4526377a$0$1349$834e42db@reader.greatnowhere. com...
> "M.I.5¾" <no.one@no.where.NO_SPAM.co.uk> wrote in message
> news:4524f40d$1_1@glkas0286.greenlnk.net
>> A metal box won't contain the fire. And the temperature of the
>> burning battery may well cause the metal box to burn as well. Charge
>> in a concreted area at least 6 feet from anything remotely flammable.
>
> Sure it does! Ever see pictures of an exploding Li-ion battery?
>

We have actually exploded Li-ion batteries to determine the size,
temperature and duration of the fireball. The one surprise that we did get
was that there are actually two fireballs, one after the other. Being in
the aerospace industry, we needed to know this information. The fireball is
hot enough to ignite metal. The size and duration of the fireball would
cause an overpressure that would certainly rupture any non vented metal
enclosure (and venting would be a step backward as it would allow the
fireball to escape anyway).

>> Any temperature rise is bad, but the battery can survive a bit more
>> than a 10 deg F rise (5.5 deg C for the civilised world).
>
> Yes of course. I only say 10 degrees because my lawyer makes me say it.

The legal newsgroups are thataway ===>

"M.I.5¾" <no.one@no.where.NO_SPAM.co.uk> wrote in message
news:452e50ac$1_1@glkas0286.greenlnk.net
> "BillW50" <BillW50@aol.kom> wrote in message
> news:4526377a$0$1349$834e42db@reader.greatnowhere. com...
>> "M.I.5¾" <no.one@no.where.NO_SPAM.co.uk> wrote in message
>> news:4524f40d$1_1@glkas0286.greenlnk.net
>>> A metal box won't contain the fire. And the temperature of the
>>> burning battery may well cause the metal box to burn as well. Charge
>>> in a concreted area at least 6 feet from anything remotely
>>> flammable.
>>
>> Sure it does! Ever see pictures of an exploding Li-ion battery?
>
> We have actually exploded Li-ion batteries to determine the size,
> temperature and duration of the fireball. The one surprise that we
> did get was that there are actually two fireballs, one after the
> other. Being in the aerospace industry, we needed to know this
> information. The fireball is hot enough to ignite metal. The size
> and duration of the fireball would cause an overpressure that would
> certainly rupture any non vented metal enclosure (and venting would
> be a step backward as it would allow the fireball to escape anyway).

Wow! Impressive. I have seen one laptop and only about a third of it was
damaged and it didn't seem that bad to me.

>>> Any temperature rise is bad, but the battery can survive a bit more
>>> than a 10 deg F rise (5.5 deg C for the civilised world).
>>
>> Yes of course. I only say 10 degrees because my lawyer makes me say
>> it.
>
> The legal newsgroups are thataway ===>

Hahaha... ok :)
--
Bill