Natural Science Forum / Chemistry / Electrochemistry / January 2007

I bought one of those Dynex 15 minute chargers from Best Buy, and I was
pretty impressed at how well it seemed to charge the AAs that came with
it.  However, with the AA NiMHs that I have laying around my house, it
seems to reject most of them.  On these fast chargers, does anyone ...

this is a package on sale in the UK,  4 x AAs +  the charger, which
claims 'automatic switch-off'.  I suspect other countries have been
spared the availability of what I fear is probably an inferior product
but I wonder if anyone here can advise?

I'd like to know whether or not it is bad to recharge already charged
batteries. Can anybody fill me in on this one?
Thanks,
Ikke

Hello somebody!
I'm looking for some salt with low melting temperature <100 C (I
suppose, it could be some organic ionic liquid e.g.
1-Ethyl-3-Methylimidazolium Chloride) to serve as liquid electrically

Greets All,
I'm trying to find a local place in Atlanta, GA to pick up KOH (potassium
hydroxide) for testing Electrolysis (using it as my electrolyte).  I don't
want to use salt because of the Chlorine gas it produces.

Greets, All
What's an easy way to measure the production of hydrogen and oxygen during
electrolysis? Sal2
What's an easy way to measure the production of hydrogen and oxygen during

Hi, I have volta master4 PGZ 402 voltalab 80 . I need to talk somebody
has experiences on Polarization, EIS measurements on low carbon steel
at cooling water with corrosion inhibitor
                                        thanks

According to this site:
http://www.duracell.com/OEM/Pdf/others/TECHBULL.pdf, Duracell NiMH
batteries do not vent when reverse-charged at a rate of C/3.  If this
is typical of NiMHs, then why is there such strong concern about mild

I have a couple of questions about the batteries I'm using to rebuild a
12V NiMH pack for my bike light:
1.  Where can I find a holder for a 4/3A cell, to allow me to charge,
test and condition individual 4/3A cells?  A D-Cell holder is just a bit

Rayovac is marketing so-called "hybrid" NiMH cells which are advertised to
have very low self-discharge rate, and are sold already charged. Is anyone
familiar with these ... what is different about their construction or
chemistry ... and is the claim true?

I have a flashlight (which I mount on my bike) that uses 4 C batteries,
that connect in series. Years ago I adapted it to use rechargeables. To
make charging an easy matter (and not have to remove the batteries) I
installed an RCA female jack wired to the batteries and later a

Can any one give a good explanation that is not so confusion concerning
the anode and cathode, relating to rechargable batteries and cells.
At the cathode of a cell you get a reduction and at the anode you get
oxidation.