Natural Science Forum / Chemistry / Electrochemistry / February 2006

Tested one purchased from Radio Shack, which is probably typical, from
fully charged, with a 25.2 ohm load, recording voltage as a function
of time, hence computed current and power as functions of time. Data
can be VERY closely approximate by 7th order polynomial functions.

A student came up with a problem on constructing a Frost diagram from a
given Latimer diagram for Iodine.
Let us assume for simplicity the the diagram is such
H5IO6 ---------> HIO3 ---------> HOI --------> I3(-) ------------> I(-)

Dears,
I'm having troubles with ECS notebook batteries.... they don't last so
long as IBM, DELL, TOSCHIBA notebook batteries.... I would like to find
out some reasons for that....

Hi every battery lover,
Is it just as simple as a dead battery stays at 0V? What is the
definition of a "dead" battery technically? Many thanks!
sboy

I and my friend both have LaCrosse AAA/AA chargers we use for NiMH cells.
I tend to charge my AA's and AAA's at the default charging rate, which is
200mA.
He tends to charge everything at the 700mA setting. We both have some 900ma

I would like to find battery discharge charts that show voltage versus
time when a certain load is applied to the battery. The batteries are
your typical coin batteries. While I am interested in a specific
battery, I can't seem to find much even for batteries in general on the

I have a dozen or so Nicad handheld radio batteries that won't be used
for a while and I was wondering if there is a difference in the life of
the batteries or the available number charge cycles of the batteries if
the batteries are self discharged or use discharged before being

I have produced 100's of I-t curve of a comb that is made up of copper e.g.
both anode and cathode is copper.
I have fixed the voltage to 1.25v, placed the copper combs in 18.3MR
(0.055uS) water and measured the current over 300sec (current is measure of

This maybe off topic but i need a little electronic advice on my
charger setup:
I need to charge a alot of different voltage lead acid batterys
6,8,10,12, ect. I have a

At a water interface of a double layer (spaced at apx 0.3nm), why is the
permittivity apx between 6-10 (Evgenij 2005 IS p.469)
at the charged interface?
Water at 20degc is 80.2.

i recently purchased a wilderness energy BD36 electric bike conversion
kit. They call it a 600 watt motor, but it runs off 36V and has a PWM
speed controller that current limits at 32-34A, so it is really a 1000W+
motor. when i give it full throttle and am going on level ground ...

I've conducted a simple experiment on a glass sample that has two clean
copper electrodes biased with 20v DC.  Between the two electrodes I
have placed a drop of de-ionised water with Universal Indicator added.
Over a period of time the electrodes changes colour, as expected, with

I have a CD player that runs on 2 AA batteries.  There is an optional
4.5v AC adapter that could be purchased.  I'm confused.  Two AA
batteries are only 3.0v and just a couple hundred milliamps.  When I
asked the manufacturer, the rep said that the higher voltage and amps

Can anyone help me find asymptote from a set of data in two column x
and y that show the frequency responce of a say a freq. responce of a
electrochem cell?
Finding it from a function seem relatively easy but without a model for