[LINK] Qantas bans Dell laptop batteries

[Geoffrey Ramadan]

Adam

A good technical application note on Batteries and Smart Batteries can 
be found at:
http://www.intersil.com/data/an/an126.pdf

Reg
Geoffrey Ramadan

Adam Todd wrote:
>
> Actually I'm more inclined to think it's not the physical cells used 
> in the packs, but the circuitry within the battery pack failing.  A 
> lot of "cheap" grade products have thermal snapping sensors to shut 
> off charging when the battery gets HOT.  A Hot battery is not a 
> guarantee of a charged battery and worse, if the thermal sensor 
> carbonizes, which they do ....
>
> And even if it's not a snapping thermal sensor, even the little 
> ceramic ones can fail badly if they get excessively hot too often and 
> batteries go get warm to touch when charged for long periods of time.
>
> Without knowing the circuitry and how they have decided to charge, 
> trickle and switch, I can't say much more.  I only know Powerbook, and 
> some HP batteries.  The early compaqs were really bad news!  Toshiba's 
> are all really good and IBMS are in my view are good too.
>
>
> At 10:24 AM 24/08/2006, Howard Lowndes wrote:
>> I think the problem is with the Sony batteries, and I doubt that Dell 
>> are the only laptop manufacturer that uses Sony batteries.
>>
>> But I thought laptops had to go hold baggage anyway after the UK 
>> panic, or have they relented on that?
>>
>> Kim Holburn wrote:
>>> http://www.smh.com.au/news/biztech/safety-first-for-carryon-dells/2006/08/23/1156012601607.html 
>>>
>>>
>>>> Safety first for carry-on Dells
>>>>
>>>> Qantas is issuing an advisory to all passengers on its flights on 
>>>> the safe use of Dell notebooks following the recall of 4.1 million 
>>>> batteries announced by the PC manufacturer last week.
>>>>
>>>> The airline said that although passengers would be allowed to carry 
>>>> their Dells either as checked or cabin baggage, they could only use 
>>>> them on battery power or through the aircraft power supply 
>>>> available in some first and business class cabins once they have 
>>>> first removed the batteries from the unit.
>>> Something must have gone strange with that last sentence ummm... 
>>> lets see:
>>> They can only use them once they have removed the battery ... nope 
>>> doesn't sound a lot better.
>>>
>>> -- 
>>> Kim Holburn
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>>
>> -- 
>> Howard.
>> LANNet Computing Associates - Your Linux people <http://lannetlinux.com>
>> When you want a computer system that works, just choose Linux;
>> When you want a computer system that works, just, choose Microsoft.
>> -- 
>> Flatter government, not fatter government; abolish the Australian 
>> states.
>>
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