On Thu, 29 Sep 2005 15:51:30 GMT, "Asimov"
wrote:

"Jim Yanik" bravely wrote to "All" (25 Aug 05 23:17:16)
--- on the heady topic of " replacing batteries in Norelco shaver"

JY From: Jim Yanik .
JY Xref: core-easynews sci.electronics.repair:340643

Anyone ever replace batteries in a Norelco (or other brand) shaver?
Anything I should be aware of or watch out for? Seems like it should
be a pretty straight forward procedure.

TIA


JY NiMH cells have a more complicated charge requirement than NiCd.
JY Unless you plan on designing a new charger,you should only replace
JY with NiCd cells similar to what you removed.


Riding my bike I found a cellphone flattened by traffic on the side of
the road. Its Li-ion battery seemed undamaged and it took a controlled
charge okay. I was thinking of replacing the 2 sub-C nicads in a hand
driver with it, as the Li-ion cell has a 1,000mA/hr spec on the label.
It seems impossible for such a small battery (2"x1.5x1/4"thick). There
are 3 contacts on the cell, beneath is a pcb with surface mount IC's.
One terminal is labelled TH, what is it, thermal monitor?

A*s*i*m*o*v

... That was a fascinating period of time for electronics

Li-ions can only be at best pulsed at a 2-3C rate. The TH probably
is the termistor and the pcb has picofuses. How will you charger
it once in the driver? Li-ion aren't for casual experimenting, as
you no doubt know..

This has a nice update on consumer product Li-ion capacities.
http://powerelectronics.com/mag/powe...s_seek_higher/