> -----Original Message-----
> From: piclist-bounces@mit.edu 
> [mailto:piclist-bounces@mit.edu] On Behalf Of Dimitrios Kapousouz
> Sent: Thursday, April 27, 2006 4:31 PM
> To: piclist@mit.edu
> Subject: [EE]: Li-on batteries & charging
> 
> 
> Hello
> 
> I have some spare Li-on batteries from some mobile phones i 
> used in the past. Yesterday i was thinking about using some 
> of them as a power supply to some small devices. My problem 
> is i don't know exactly the functionality of the pins. I find 
> 2 GND pins 1 Vdd pin and an other pin in some batteries 
> without any sign, in others called "T". What is this "T"? 
> Also is charging of Li-on batteries the same way as Ni-Cd?
> 
> Thanx
> 
> PS: I remember some time ago talking about a good program 
> that is useful while debugging (with MCUs & the RS-232 port) 
> . Can anyone help me remember the name? thanx


I would venture to guess the "T" terminals belong to a thermistor
embedded in the pack.

The charging algorithm for LiON is not the same as NiCad.

Rob Young
rwyoung@ieee.org
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