I lost the little rubber ring that goes in between the battery cover plate and the battery on Garmin's HRM. I called Garmin and they have no part # for that. I know one solution, buy a whole new HRM for 35-40 dollars, ha!
I think the seal ring is essential, it keeps the battery down in its place. Ever since I lost it my HRM stops working randomly and I have to open it back up and reseat the battery, since it comes loose with the little room between the battery and the cover plate.
Anyone got an idea for a replacement ring? I was thinking of checking out some hardware/automotive store for a gasket or something. Thing is probably the size of a quarter or so.
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