Question about Garmin GPSMAP 276C GPS Receiver

3 Answers

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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  • Aussietraks Jan 09, 2008

    I don't believe this is correct as the GPS has to maintain both time and position information when the main battery is removed or absolutely flat.

    Until recently it did this very well. The GPS is stored with the main battery fully charged.

    See also

  • Anonymous Apr 03, 2008

    I'm having the same problem. Was told by Garmin that there is a capacitor that has gone bad in the unit and it will cost $170 to repair

  • stephanversc Dec 13, 2008


    I have the same problem. I've already changed the 3V backup battery but the gps is still mallfunctioning. With the new battery however it finds quicker the satelites.

    What else can cause memory loss ( hour and date ) ???

    Thanks for tips


  • jspringsteen Apr 07, 2009

    Have the exact same problem. Replaced the battery to see if it would solve the problem and it did NOT. Contacted Garmin and all they stated was for me to send the unit in and have them try to fix it for $175...ouch!



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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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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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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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