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Old 06-20-05, 10:31 AM   #1
nikos
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Polar A5 acting funny, chest strap need batteries?

Alright, I heard that the strap needs to be sent back to Polar for new batteries - my reading are acting up, jumping from where it should be to high and low readings - sometimes dropping to zero? Is this a sign that the batteries in the strap are bad, or is it maybe the watch batteries?
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Old 06-20-05, 11:03 AM   #2
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Probably the strap, have you been using it long enough that it seems possible? They publish the expected transmitter battery life in hours of usage, not that anyone tracks it. But it gives you something to base a guess on.

Returning for new batteries is almost as expensive as getting a new one... check around first.
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Old 06-20-05, 11:08 AM   #3
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that's what my was doing so i stopped useing. ended up to be a-fib, so take your pulse and make sure it is correct.
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Old 06-20-05, 12:04 PM   #4
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Its been a few years, so Im sure its time. Just that I had a 122 mile ride on Saturday, without the thing working, not much fun wearing the strap for nothing! Like the post above, I havent been using it for a while because of this issue, but thought maybe it was a fluke, found out Saturday that it wasnt.
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Old 06-20-05, 02:08 PM   #5
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"not much fun wearing the strap for nothing!"

Do you even notice the strap? I thought I was going to hate wearing it but since I started wearing it a week ago...I dont ever notice the thing on.

new strap is about $30 I think.
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Old 06-20-05, 02:32 PM   #6
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A few things can cause the results you've seen.

One thing could be the contacts aren't wet enough. When I see my hr spike to 265, I will try sliding it around to get them wet with sweat, and that sometimes helps.

Also, static build up from polypro shirts can cause bad readings. I have a particular polypro shirt (not all of them do it) that I always causes bad readings when I wear it, and I think it is because it rubs the strap and creates a static charge. Keeping the shirt wet is supposed to help, but the air here is so dry, it isn't easy to do. I haven't figured out a way to stop it.

Bad batteries in either the watch or strap, as you noted, can cause it. You are supposed to send it to Polar to get it replaced. It's about time for me to get the batteries replaced (they are four years old) but I've been meaning to find out if there is a cheaper DIY method, at least for the strap.
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