Francesco L. wrote:
The latest Ni-Mh have an impressive power and capacity. Just as an example
I've seen some AA 1,2 v with 2900 ma/h of capability. If you find some of
these (even through the internet) you go "green" andsave lots of money. I
think their power has since a couple of years surpassed the most powerful
among alcalines, so there's no point in keepeng to use these last ones. Move
ahead and try the ni-mh with confidence.

There are two types of ni-mh batteries. The older ones which have a low
internal resitance, and the new higher internal resistance types. The
main differences are the old type has a much higher output current, but
discharges about 1/3 of it's charge in a week. They are good for high
current devices, such as anything with a radio transmitter in it
(cell phone, HT) or a large microprocessor (laptop).

These batteries have a relatively low capacity and about a 300-400
charge cycle life.


The other, newer type are sold as "green" batteries. They take about
a year instead of 3 weeks to discharge, so they are usually shipped
partially (80%) charged. Here they are repackaged by a company called
Great Peak (GP) in Hong Kong as Recyco brand. The cells are actually
made by a Korean company.

These batteries have very high capacity and a long charge life,
up to 1000 charges.

Geoff.



--
Geoffrey S. Mendelson, Jerusalem, Israel N3OWJ/4X1GM