+proimion Posted January 22, 2008 Share Posted January 22, 2008 I know to always recalibrate the compass on my Garmin after changing the batteries. I just don't know why. Anybody have a good, technical explanation on the relationship between battery strength and compass accuracy? Quote Link to comment
SiliconFiend Posted January 22, 2008 Share Posted January 22, 2008 I know to always recalibrate the compass on my Garmin after changing the batteries. I just don't know why. Anybody have a good, technical explanation on the relationship between battery strength and compass accuracy? It don't think it really has much to do with battery strength. The issue is probably more with the metal in the batteries that affect how the magnetic flux sensor reads. The earth's magnetic field is very weak, so a small amount of metal can affect the sensor. So, each battery might have slight variations that could affect the compass. Even the same batteries (if you're using rechargables) could conceivably affect it depending on how they're installed (there could be small axial variations so if you rotate the battery in the slot it might skew it). Quote Link to comment
Smac999 Posted January 22, 2008 Share Posted January 22, 2008 probably more to do with losing it's memory / settings with no batterys inside (durring the swap) but I could be wrong. Quote Link to comment
+apersson850 Posted January 22, 2008 Share Posted January 22, 2008 Yes, that's the reason. Different batteries have different magnetic characteristics. Quote Link to comment
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