Follow-up: Trivia time - 2748 cache battery

As I promised:

The card does charge the battery, when I checked the voltage today on
the one I replaced on June 15 the voltage was 4.2 VDC.  When I put it in
the battery was just a hair under 3 VDC.  Therefore, this procedure is
accurate and works.  I hope folks can find this useful, and be careful
not to snap your card in half when mounting the holder back on!

Justin C. Haase - iSeries System Administrator
IBM Certified Systems Expert - eServer i5
Kingland Systems Corporation
email - justin.haase@xxxxxxxxxxxx


-----Original Message-----
From: Haase, Justin C. 
Sent: Wednesday, June 15, 2005 11:57 PM
To: 'Midrange Systems Technical Discussion'
Subject: RE: Trivia time - 2748 cache battery

Ok folks!  Here's the good word.  Since this is a sandbox, I figured no
guts, no glory.  Plus, a replacement controller with a battery on the
secondary market is only a couple hundred bucks.  So I took the case
apart, removed disk controller, removed on-board battery.  Took battery
to local Wal-Mart, matched connector to a Sanyo model GES-PCF01M
battery.  3.6V just like the other one.  (BUT BE CAREFUL!  There's one
which is the same connector and color, just polarity is reversed)  This
new battery I picked up is exactly the same size, same connector (even
same markings on back of connector), same EVERYTHING - only difference
is the case on this one is green, the case on the old one is yellow.
Looks like the "new technology" battery I picked up is NiMH, the old one
NiCad.

Checked voltage of existing battery and new - corresponds.  Installed
and IPLed to DST, performance degraded condition gone.  Now - can't say
if a flag gets set with removal of the old battery (like I could have
just unplugged and replugged it and the system would have known no
better) and I also can't say if the system gives any sort of charge to
the new battery.  So - someone remind me in a month or so, I'll take it
apart again and check the voltage to see if it held.

Other than that bit of concern, though - the system's running great!  No
SRC, no problem records - fantastic!

$19.95 and a bit of time - problem solved.  Once I do a voltage check in
a couple months, we can add this to the archives as a tasty nugget o'
info.

Justin C. Haase - iSeries System Administrator IBM Certified Systems
Expert - eServer i5 Kingland Systems Corporation email -
justin.haase@xxxxxxxxxxxx


-----Original Message-----
From: midrange-l-bounces@xxxxxxxxxxxx
[mailto:midrange-l-bounces@xxxxxxxxxxxx] On Behalf Of Haase, Justin C.
Sent: Monday, June 13, 2005 8:47 AM
To: Midrange Systems Technical Discussion
Subject: Trivia time - 2748 cache battery

Good morning, all.

Wondering the best place to get a new cache battery for a 2748 DASD
controller.  They certainly look like cordless phone batteries, and
since this is a play/sandbox system which is out of maintenance, I can't
just call 800.IBM.SERV and have our local CE come and replace it - at
least without a hefty convenience fee :) .

I'm showing the PN as 44L0302.  Anyone have an offical Sanyo part number
for this battery (have seen Sanyo on a previous pull - didn't save the
battery and go stock-up though), or do I need to shut down, take the
whole box apart, and then go to the local supercenter to find a match?
Hopefully someone has done this before and can save me the multiple
tear-downs.  Thanks in advance!  Have a great week!

Justin C. Haase - iSeries System Administrator IBM Certified Systems
Expert - eServer i5 Kingland Systems Corporation email -
justin.haase@xxxxxxxxxxxx


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