[Tfug] Source for notebook batteries?

[johngalt1]

----- Original Message ----- 
From: "Jim March" <1.jim.march at gmail.com>
To: "Tucson Free Unix Group" <tfug at tfug.org>
Sent: Tuesday, September 22, 2009 9:32 PM
Subject: Re: [Tfug] Source for notebook batteries?


>>>I saw all the posts about doing it yourself and I still 
>>>fall back to my main rule of thumb... that is... with 
>>>volatile things like batteries, I would never take a 
>>>chance. I say that because it dawned on me at some point 
>>>in my life that with the more dangerous things like 
>>>batteries, there could be just one "professional insider" 
>>>piece of info, or one law of physics, or something that's 
>>>just not obvious that that I may miss that may lead to a 
>>>dangerous situation.<<
>
> Rocco, the thing is we're not talking about opening up any 
> ONE
> battery.  That would be nuts.  What's going on here is 
> that the
> factory is packaging an array of individual batteries 
> wired together.
> We're calling them "cells" but really, it's the same as 
> sticking six
> D-cells in a boombox or something.
>
> In the factory layout, the wires are soldered to the 
> batteries.

No, no, no.

I implore everyone to pay attention to Don Bexley Hall's 
post as follows:

http://www.tfug.org/pipermail/tfug_tfug.org/2009-September/023732.html

+1


> The
> replacement batteries can be ordered for twenty cents a 
> piece extra
> with little tabs.  So you clip out the original batteries 
> after
> writing down how it's wired, you buy little crimp-on ends 
> to go on the
> new tabs from radio shack, you make sure you're dealing 
> with the same
> voltage (usually 3.7v but do check) and the same type 
> (generally
> Li-Ion) and size (easy enough to measure) and you're good 
> to go.
>
> Here's the thing: while this sounds scary, at least you 
> know what
> batteries you're buying as opposed to "crap 'o the week" 
> whatever the
> company had available who sold you a complete, packaged 
> battery.
>
> Knowing what you're really buying in terms of the cell 
> source makes
> this, to me, SAFER than buying "something on EBay" that's 
> a completely
> package.
>
> Plus, you know that you're using the original issue charge 
> controller
> circuit board, and that's yet another critical piece...
>
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