Question about Garmin GPSMAP 276C GPS Receiver

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276C Memory Battery

My 276C has begun to malfunction.

If it is switched off for more than a short period the clock loses time and it forgets it's most recent position. And it requires a cold start, that is it takes maybe 15 minutes to re-establish its current position. At that point it works OK again but I suspect the memory battery is failing.

Thanks in advance,

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Re: 276C Memory Battery

There is a button cell soldered to the main circuit board that powers the real-time clock while the unit is off or the main battery is removed or flat. After a couple of years this button cell dies and has to be replaced. I've had this problem twice in five years, and each time replacing the button cell fixes the problem.

Needs a Garmin workshop, or someone who's good with a fine-point soldering iron.

Posted on Dec 21, 2009

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Re: 276C Memory Battery

I had the same problem. The Real Time Clock slowly started to fail and my unit lost both time and position between uses. Had to return to Garmin at a cost to fix of over $200.00. They could not fix it and sent me a remanufactured unit.

Posted on Jan 30, 2008

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Re: 276C Memory Battery

Replace the main battery. The main battery is used to provide power for all functions, there isn't a separate battery like in PDA.

Posted on Jan 09, 2008

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