FW: Battery

[John Teller]

That third contact is a temperature sensor - something cheap, like a 
thermistor.  It's to give the charging algorithm an idea of the cell 
status.  It doesn't have to be too terribly accurate +/- a degree C or 
two is plenty.

---JST



On 01/30/2014 12:15 AM, Alex Fraser wrote:
> OK, this is very informative.  In any device with the 3 connections to 
> a Lithium Ion battery,  +,  - and T is the battery safety device 
> inside the battery pack or inside the device?  If I want to duck tape 
> on an  an equivalent voltage AA alkaline battery pack will the device 
> care? It was mentioned that the safety chip is in the pack, yet 
> suggested that a 10 ohm resister be placed between ground and T to 
> fool the device.  I have hoked up power to some devices and they 
> worked OK, but others seem to flake out.  Perhaps it is done both 
> ways. in the pack and/or in the device?  I'm thinking I'm going to 
> have to do some gizmo surgery or maybe gadget autopsy work, like 
> forensic electrons I guess...
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