Ok, I'm assembling a quick and dirty temp sensor with an LM35, a PIC and a display, this would solve the mistery.

But, I can *triple* assure you that, among 7-8 batteries I have, when they are left in upright position, on the table, one against each other, with no special events affecting the room and all the other initial conditions we might discuss here.. well, one of the (fake) fully charged battery IS colder than the others!

I have a peltier cell, a small one, when I power it up with a 9V battery I can feel one side sligtly colder, and the other a little hotter, nothing serious, well, that's the feeling - it's a subtle reaction.

Also, I say "colder than" like the fakes are "lighter than" the original.. and you can feel holding the original against a fake.

I know! Either it's free energy............... (but I'm not a believer) or, as I suspect, it is internally eating itself (the voltage remains relatively high at 4.13).

I know, before doing the experiment there are a lot of factors that could get in the way of the experiment:

_ I could put in the fridge the battery, then later take it's temperature (..)
_ I could alter the video documenting the issue (..)
_ There could be really a colder spot on the table
_ The temp sensor, on the suspected battery (by chance), will not make full contact thus falsifing the reading..

.. and many more! I don't have a lab and controlled environment.. nor an independent observer..

But I'll do my best to solve the mistery!

P.S. If you don't see me anymore on the forum.. it means I'm heading to China, buying the factory that made "that" cell