Smaller than AAA, I think they are AAAA cells.

All alkaline batteries are under pressure, which is why they need to be
"leakproof".

I wish Duracell would learn to make them really leakproof, they are
pretty sure to leak if left under even the smallest load for a length of
time. Energizer seem to be a little better in that regard, but that's
not the brand Costco sells :(

Cheers,

Bob

On Wed, Jan 30, 2013, at 11:52 AM, Carey Fisher wrote:
> On 1/30/2013 12:22 PM, KPL wrote:
> > I'm having a habit of collecting parts that could be usefull at some
> > imaginary point, and I actually had a project that could use a
> > connector plate from such a 9V battery. When one of them got dead,
> > wanted to get that end with connectors out of it - used pliers to bend
> > open the end, and there came my surprise. Two out of 6 cylindrical
> > elements just plain exploded, sending their guts across the room. I
> > was completely not ready for that, since I had collected those parts
> > since childhood without any accidents.
> > So, actually, they can be really dangerous.
>=20
> Those cylindrical elements are AAA cells.
>=20
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