[Elecraft] Being cautious around Li-Ion Batteries

[Doug Person via Elecraft]

Just a quick note to affirm the need for caution around Lithium-Ion 
battery packs.

Today I was charging a new 12 volt Li-Io battery pack.  Fist time being 
charged.  I was using a specialized automatic Li-Io charger. 
Nonetheless, the battery pack exploded with an incredible force, blowing 
items off my workbench within 2 feet of the explosion.  The burn area on 
my workbench exceeds 12 inches.  If I hadn't been wearing safety 
glasses, I'm sure my eyes would have been badly affected.  The sound 
level was at least equal to a 44 magnum. My facial hair has been burned 
and there are numerous particles embedded in my skin, walls and table.  
The furthest piece, embedded in ceiling, is at least 10 feet from the 
ignition point.  About 2 ounces of C4 would perform about the same.

I consider myself lucky in that I was wearing my welding jacket which 
protected my body very well.  I was only 18 inches from the pack when it 
exploded.

I never realized or expected such a thing to happen from a commercially 
produced battery pack.  I guess I will weld together a steel blast-proof 
box should I have nerve enough to ever use these battery packs again.

73, Doug -- K0DXV