Natural Science Forum / Chemistry / Electrochemistry / July 2005

How can i tell if my charger can support 2700 1.2v NiMH AA batteries?
my charger is an "AccuPower accumanager 20 super-fast-charger."
it says the output is: 4x max.1.8VDC/max.700mA,2x max.12VDC/max.30mA the
input is: 12-16VDC/800mA.

Recently someone showed me a sample Li-Ion charger from China that
charges a bare  "18650" Li-Ion cell.  Apparently the battery goes into
an LED torch once it is charged.
Has anyone seen a charger like this before?  Is it safe? There is no

I have an older PDA which uses a Li-Ion battery pack (3.8V@1000mAh)
that was evidently used only on this PDA, and never again.
Consequently, the replacement packs available are (a) expensive and (b)
probably degraded by age.  I'm considering trying to substitute a

Can anyone point me to a good review paper or book chapter dealing
specifically with VOLTAMMETRIC sensors?
I am especially looking for the discussion of the sensors
that make use of some voltammetric signal analysis.

From what I've read it is possible to recharge a single large lithium ion or
lithium polymer cell by just using 4.2 Volts DC.
There would not be any "protection circuit" needed.
Is this true?

Is there any website giving overviews of everything from Aluminium-Air to
Zinc-Chloride cells?