> Lithiums are not as robust as NiMH though -- you have to make sure never to
> discharge them below 3V/cell and their chargers are usually more expensive.  I
> also read somewhere that if they rupture, they can release HF.  I'm not sure
> if that's true or not (hopefully not), but it's something to think about if
> you're looking at safety.
>
> Mark

Possibly. Depends on other constituents. See for example
http://www.inspired-energy.com/Standard_Products/NI2040/NI2040A20_Cell_MSDS.pdf
and others,
which warns that combustion will liberate HF

Stuart
>

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