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Rich Hawley - 2013-08-21 8:03 PM
Years ago I had a bad 680 or 690...I can't remember which, but the circuitry that controlled the backup battery didn't work..and it was more than just a simple open or shorted circuit that wouldn't allow the current to pass. The current was passing fine, but it was actually draining my coin cell in just a couple of hours, even with the a/c adapter plugged in....and I also got that infamous low battery warning.
In order to avoid the message, I ended up finding a 3V spot on the circuit board and ran a jumper wire to the contacts where the coin cell was connected. I no longer had a good backup battery, but the Jornada thought I had a good one and quit giving me that message....but I never dared to pull the main battery without the thing being plugged in or it was hard reset time....
Wow! That's quite hands-on, thanks. Good to have a workaround.