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  1. #1
    Member rt1965's Avatar
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    Changing Batterey on my HRM...

    I have a Polar F55 HRM that I use for non-cylcing excercise. I don't use it in water and it's long past being under warranty. Any issues with me changing the battery myself? Thanks for any advice.
    Trek Pilot 5.2
    Trek 930

  2. #2
    Senior Member AnthonyG's Avatar
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    I'm not familiar with the Polar heart rate monitors but I would suggest that the first issue you will face is do you have the watch tool to open it up?

    I have a Sigma heart rate monitor which is supposed to have a user replaceable battery but this doesn't mean that just anyone has the right tool lying around at home to do the job. The good news however is that I took the unit down to a regular watch place that replaces batteries and they had the job done in a couple of minutes for not that much money.

    Anthony

  3. #3
    Member rt1965's Avatar
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    The Polar F55 has a removable back that is held on by 4 screws, so yes, I can take it off. Just wondering if anyone has done it and if there is anything I should look out for?
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  4. #4
    It's ALL base... DScott's Avatar
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    I just did this on a Polar F6 unit- the four screws are not the problem, unless you drop one.

    The battery is held under a metal clip contraption that's quite fidgety. Just go at it easy, gently prying each corner of the clip up and try not to bend anything in the process.

    Keep all the pieces organized as you take it apart, and be sure you can put it all back together in the right order without bending anything or introducing any fingerprints or dirt to the inside of the unit.

    It's entirely do-able if you have any mechanical skill and some patience. Otherwise, it might be worth a few bucks to have the local watch people take care of it for you. There's no need to send it back to Polar, unlike the strap when it needs replacement.

    Good luck!

  5. #5
    Member rt1965's Avatar
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    Quote Originally Posted by DScott View Post
    I just did this on a Polar F6 unit- the four screws are not the problem, unless you drop one.

    The battery is held under a metal clip contraption that's quite fidgety. Just go at it easy, gently prying each corner of the clip up and try not to bend anything in the process.

    Keep all the pieces organized as you take it apart, and be sure you can put it all back together in the right order without bending anything or introducing any fingerprints or dirt to the inside of the unit.

    It's entirely do-able if you have any mechanical skill and some patience. Otherwise, it might be worth a few bucks to have the local watch people take care of it for you. There's no need to send it back to Polar, unlike the strap when it needs replacement.

    Good luck!
    Thanks for the advice. Luckily I have one of the straps that can be changed without having to send it in, but not the watch unit. I think I will give it a go.
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  6. #6
    Because I thought I could ks1g's Avatar
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    Make sure you have the right battery. When I replaced the battery in my 720 (not a swimmer, so full water proofing not a requirement), the Nuon brand battery of the exact diameter and thickness did not fit. Turns out the Panasonic brand cell has a slight beveling and the battery compartment in the 720 requires it. The local BatteriesPlus had it and even let me borrow tools and a magnifier to do the job in the store. Your results may vary - try a search to see if someone has posted on your model HRM.

    Here are two threads on the subject. How To: Replace Polar HRM battery Polar HRM - battery replacement

  7. #7
    Member rt1965's Avatar
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    Thanks ks1g for the tips on the Panasonic battery. Haven't tackeled it yet, but will probably get to it this week.
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  8. #8
    Senior Member tntyz's Avatar
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    I have a Polar F1 (?) and could not find a battery at any of the local watch battery locations. Did find it at Batteries Plus.

    The metal clip has a catch mechanism that open real easy once you see where to put the tip of your (very small) screwdriver. Be careful not to force it! I watched in horror as a clerk at on store went at it with great vigor. I told her to lighten up and let me do it.

    It's an easy job. Don't really know why Polar wants to void the warranty if you do it yourself, but that's their policy. It's out of warranty, so diy for $4 sounds like the route to go.

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