Natural Science Forum / Chemistry / Electrochemistry / June 2005

I posted a few months ago about building a discharger for a DeWalt 18v
battery. Thanks to everyone who contributed suggestions and ideas. We
have our first one built and working.
A bit of background - We have a DeWalt 18v recip saw on our rescue

I'm interested in the price a scrapyard will be getting for pallets
of 12V car batteries.
Any thoughts?
So I can go with my battery tester, and buy 8 or so for my UPS.

Figured I'd get an informed answer here. We were
talking about cell phone batteries.
I wrote:
   Because that's the chemical characteristics of Li-Ion batteries...

I am working with a Princeton Potentiostat, which I also attached to a
mercury drop electrode. It happens that all the experiments that I have
been working with (with and without the mercury electrode) have a lot
of noise. Discarting the reagents which are high purity, we decided

Does anyone know any more about this yet?
http://www.europositron.com/en/index.html
It is a nanotechnology aluminium battery supposedly capable of 1330
Whr/kg, (Li-ion ~200 Whr/kg) , 3000 + cycles.If it works,electric vehicles

I am trying to convert pure water (0.055uS) to molality (g/mol) at 25degC.
Can anyone please help?
Cheers
Wayne

When at a friend's dinner, a guy used a sort of self-built or bought
can with a cap where two large electrodes had been inserted. He filled
the can with our expensive first quality brand table-mineral water.
After 10' of connection to power supply (220 volts), the water turned

I would like to work out the charge of a contained group of ions.
I assume that the charge Q is :
Q = z q Na c
where the ions has valence 'z', q is the charge on a proton, Na is

I want to kill myself with batteries.How many of them do I have to
throw at my head until my skull breaks ?

Laptop Battery Problem
I just bought a new Toshiba laptop just 2 weeks ago
Satellite M35X- S114 - Win XP with Intel Celeron , 40GB 256 RAM
When I turn on my laptop WITH the power cord connected to the power

What is an EHP battery?
 I recently purchased one of those portable power stations/jump
starters.   The only specs on the internal battery are:
"High current EHP battery provides 1,110 Amps peak power, 425 Amps

I bought enough batterys to run my planed electric usage for a total of
5 rainy days (1170ah). This was with the idea in mind that I would just
keep buying 2 solar panels every few months till I had 60 amps in panels
which would be just over the C/20 MIN, requirement for charging ...

Sorry if this is a double post -- I may have hit the wrong key.
Where would I find info on heat generated by batteries and how much
their dimensions might change as they are being discharged?
I am interested in AA Alkaline and NiMH in particular. I am also

I heard that creatures exist, that can fry a human with a lightning bolt.
Is that true?

I used to use the Sonnenschein 12V 36Ah Deep Cycle batteries to power
an amateur Electric Vehicle.  They recently discontinued this battery
in Australia and replaced it with a 38Ah.
I have an upper limit of 36Ah allowed on my vehicle, due to competition