> Looking at the page, I also don't see any protection circuitry..
>
> Normally, you'd have a small circuit board that protects the battery
> from high current discharge, and from discharge below a certain
> voltage.  In this case, the battery was probably designed to be
> plugged into a system that provided that protection.
>
> I would urge the OP to read up on these cells, and not to use them
> unless he really understands the hazards and has some method for
> dealing with them.

In the product I designed with a lithium ion battery, the protection
circuit was inside the battery pack. In fact, it was not possible to buy
the cells at all. You had to buy a battery pack that included the
protection circuitry. We worked with a company that assembled packs,
including the cells and the protection circuitry. The protection circuit
(in the pack) protected the battery pack from over voltage, under voltage,
over temperature, over current, etc.

So, it would be interesting to know if the packs have a protect circuit in
them. I'd be surprised if they did not.

Harold



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