Natural Science Forum / Chemistry / Electrochemistry / June 2004

Hey, I was wondering why they couldn't use Nickel-Zinc batteries in place of
Nickel-Cadmium ones. It would reduce pollution. Zinc has almost the same
properties and is lighter and more compact too.

Never recharge ___-___________ _________!

I'm not asking about the vehicle starter battery, but the two leisure
batteries I have fitted to the living space of my motorhome.
When I bought the MH it came with one 110Ah leisure battery, while my wallet
was out I also purchased an 85Ah leisure battery.

7500 mAH capacity 12 VDC pack of 10 "D" cell NiMHs, used to power
telescope system - motors, electronics, LEDs, etc. Designed and built
a charger, based on two film capacitors to limit the current from AC
line input through a full wave bridge rectifier and then directly into

Why don't they start making devices that use any size battery so we could use
those D sized battery that would be way cheaper per unit of energy?

Isn't it amazing that 9 volts is enough to split any salt into its elements,
especially since they are available at almost any grocery store for a few
dollars?

Could they make battery chargers that recharge non-rechargeable batteries so
fast (in nanoseconds) that the battery has no chance to leak or explode? Any
opinions?

    After adding water (too much at times), and trickling with minor power
supplies, I hit the dude with a vintage standard Montgomery ward auto
battery charger. This started pumping about 1/3 amp through it, at a
high volage (goes up to about 16 or 17 volts, I think). At one point, ...

Are all LiIon battery chargers/adapters like in laptop, palm, cellphone etc
are nothing more than a DC voltage regulated power adapters ? or are they
some sort of special adapters ?
TIA

I read (in a Motorola whitepaper
http://www.motorola.com/ies/ESG/testlab/article1.htm) that charging Li-Ions
to a voltage limit of 4.1V instead of 4.2V prolongs cycle life on account of
not getting the maximum capacity out of the battery. The article however

1. I did a bunch of online research on rechargeable li-ion batteries a
couple weeks ago or so and it was noted that li-ion batteries lose
charge slower when at lower temperatures. It was also noted that they
deteriorate (oxidize), slower at lower temperatures. Also noted was the

There is in Popular Science letters section a question
and answer about the products of electrolysis of
NaCl solutions.
We all know that H2 comes of the cathode, but does

I need a protection circuit for my lithium polymer battery.  All the circuit
needs to do is prevent the cell voltage from going below 3v.  If the voltage
goes below 3v then the battery must be disconnected to prevent damage caused
by deep-discharge.

Does anybody have some idea where i can get usable Information for the
industrial electrochemical processing of glycerin and various downstreaming
processes. e.g.: Links for Scripts, Newsgroups, Books
Kind regards,

Dear group,
I'm on a role here. Looking around on the net, I found a charger. Here's
the description:
"ACS 110P4M  (Mobile charger for battery packs)