Date: Mon, 29 Apr 2002 14:05:11 EDT
From: [EMAIL PROTECTED]
Subject: Re: [LIB] Taking the battery apart & Li Ion Cells

In a message dated 4/29/2002 9:23:48 AM Mountain Daylight Time, 
[EMAIL PROTECTED] writes:

> > If you can locate a very thin-bladed tool, like automotive feeler gauges
>  or a
>  > thin lab spatula, work it in vertically at the ends of the battery case 
to
>  > break the seam and glue joints there.  Once you get one end to separate,
>  you
>  > can carefully pull each case half away from the other and split the case.
>  > (You may need to break the joints at both ends of the case with the tool
>  for
>  > a clean separation.)  This sounds crude, but it has worked well and 
avoids
>  > the marred seam lips that you get trying to pry the case apart.
>  
>  
>  I don't agree. This method implies that once you have the ends spirited,
>  keep pulling. The battery has tiny hooks all along the length that will
>  break with this method.
>  
>                    ___                                    ___
>  _________|     |__________________|     |___________
>  
>  if you don't mind them being broken ( I use various colored electrical tape
>  to keep the battery together after opening ) then pry away!

I have separated three PA2503U L1x0 batteries, and a similar number of L50/70 
PA2498Us (from which I extract the intact assembly for transplantation to the 
2503 case).  The 2503s I've separated do not have the hooks and clips, but 
the 2498s do.  The 2503s I've worked on have continuous overlapping lips, 
which appear to have been lightly glued for assembly, and which separate fine 
using the method I described.  [In fact, the 2498s separated well this way, 
too - the gutted 2498 cases I have laying around snap back together using the 
hooks and clips.]

>Date: Mon, 29 Apr 2002 19:40:51 +0400
>From: "Gennadiy Tsygan" <[EMAIL PROTECTED]>
>Subject: Re[2]: [LIB] li-ion cells
>
>I have not tried to put 18x64 mm cells in the battery because I only have 5 
of
>them, but 17 mm seemed a tight fit. There is sticky tap in my battery, but it
>is not foamy and very thin.

With respect to the posts on differing cell diameters, the 2498 cells are 
larger in diameter than the 2503 cells, probably about 1mm.  I've found it 
necessary to relieve the 2503 case interior pads and saddles to accommodate 
larger cells, but they can be made to fit.  The 2503s use the double-sided 
tape to immobilize the cells in the case, while the 2498s use a black 
elastomeric glue.  Shoe Goo or equivalent works well for rebuilds.  And a 
very light bead of epoxy around the seam of the 2503 case closes it up nicely.

Lee




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