Date: Tue, 19 Feb 2002 18:45:10 +0800
From: Raymond <[EMAIL PROTECTED]>
Subject: Re: [LIB] Charge / Run ..

At 02:06 AM 19/02/2002 -0800, you wrote:
>Date: Tue, 19 Feb 2002 09:58:00 +0000
>From: T i m <[EMAIL PROTECTED]>
>Subject: Re: [LIB] Charge / Run ..
>
>Hi Raymond,
>
>Raymond wrote:
>
>>
>> >[T] Cool .. just got to get one (Air/Car) now ..  the 'Mobility' unit appears a 
>few times on the USA eBay  .. is that what I want? I might also try some of the 
>external battery 'tricker' ccts .. for when I don't need the engine on ..
>
>>
>> I'm not familiar with the 'Mobility' unit,
>
>[T] This is what I think it's supposed to be?
>http://www.mobl.com/products/product.asp?ProductID=1026
>(It mentions the L 100 but I'm assuming it's the same power requirements / plug type?)

The L100/110 uses a different plug to the L50/70 but you can get the latter at any 
decent electronics store. The specs on that device don't seem to be the same as the 
Xtend unit (eg. 50W Vs 45W, interchangeable output plugs Vs a hardwired plug) but it 
should be quite suitable.


>[T] This was the one I found on eBay (well there are a few of the same ..)
>http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=1806668530
>
>> I suggest perhaps a trawl in the archives on the subject
>
>[T] Sri .. where / how do I do that (sri for being so dumb but I'm a Libby Newbie!)?

Links at the bottom of each email :-)


>> because there are at least 2, possibly 3 flying around (as in distinctly different 
>ones as opposed to the same one rebadged), some having greater levels of interference 
>than others as well as varying levels of output stability.
>
>[T] Ah .. ok .. point noted ..." you gets what you pay's for "

You do? You've obviously never gone through wholesaler clearance catalogues or eBay ;-)


>> I'm using the one by Xtend Micro Products which does quite a nice job and doesn't 
>get too hot. http://www.xtendmicro.com/ has a picture of it.
>
>[T] Ah, another consideration .. I suppose the hotter it gets the less efficient is 
>must be? Looked at the site ... nice stuff!

Well some AC adapters I've had do get hot enough to be uncomfortable to touch. This 
unit was still relatively cool even in direct sunlight (the same can't be said for the 
24 to 15 volt dropper I had to put in line which got too hot to touch ... heh). I 
don't think efficiency is a big problem - an auto, air or motorcycle 12V circuit has 
more than enough power to afford to waste a bit of it, we are talking lightbulb sort 
of power wastage here (and I'm talking sidelight sort of lightbulb, not headlight).


>> Like I said though, a hunt through the clearance catalogues of the bigger 
>wholesalers round the place might get you a better deal than eBay .
>
>[T] Especially if you see ad's like this ..
>http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=2002955511
>
>[T] This could be better if it's 15V out?
>http://cgi.ebay.com/aw-cgi/eBayISAPI.dll?ViewItem&item=2003387871

The former looks like the same unit as mine (remember though, the voltage on the 
PowerXtender unit is set by the plug and flylead, I think the plug has some circuitry 
in it which feeds info back to the switchmode controller in the main unit). It doesn't 
say what voltage though ... I can't see the voltage of the latter one but you can look 
it up on IBM's website as to what voltage those laptops take ... if its any over 15 
volts just put a 15 volt linear regulator in the line (and slap a big heatsink onto 
it!). 


>> .. certainly the ones round here tend to order these things in for customers who 
>then don't buy them so they sit around the warehouse for a year or 2 before they 
>clear them out for a fraction of what they might fetch on eBay.
>
>[T] Any clues what warehouse(s) please Raymond? (im in the UK?)  All the best and 
>thanks again .. T i m

Well I'm in Perth, Western Australia so sorry I wouldn't have a clue about the UK ... 
you should have heaps more than we do though! I'm sure a search on google for computer 
parts corporate suppliers, wholesalers and discount clearing places should turn up 
something.


Hope this helps!

- Raymond

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