14Sep/08133
How to replace the battery in a Polar F11 Heart Rate Monitor (HRM)
Disclaimer: The user manual for the Polar F11 clearly states to take the HRM to a Polar dealer and have them replace the battery - taking the back off could void your warranty. If you wish to be 100% sure that you maintain the water-resistant seal and do not want to void your warranty - or risk breaking your HRM (certainly a possibility when you take it apart...), take the unit to an authorized Polar dealer and have them replace the battery.
| Step 1: Remove the back cover (4 little screws - make sure you have the right size screwdriver or you'll strip them out). Also note that the back has a water-resistant seal - keep this clean and remember that there is always a chance that the seal may be damaged if you do this yourself. | |
| Step 2: Remove the internal unit from the watch casing (it just pulls out). |  |
| Step 3: Get something to pry the battery latch tab with (I used another small screwdriver) |  |
| Step 4: Take whatever you used to pry the latch tab out with and use it to pry the battery up by placing the device (screwdriver in my case) in the notch above the latch (see picture). |  |
| Step 5: Go to Wal-Mart and purchase a new CR2032 watch battery (you may want to do this before hand... I didn't know what battery it used so I had to take it out first) - runs about $3.50. |  |
| Step 6: Put the battery back in and put everything back together. |  |
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May 1st, 2010 - 09:06
Hi Great site. I tried to change the battery but got a little careless and the whole assembly came apart. I have a small clip on part with what looks like 2 contacts or perhps it’s some kind of spring. Does anyone know where it fits the watch refuses to power up so it seems i may have to buy a new one.
Can anyone help Pictures would be very helpful
Thanks
June 1st, 2010 - 06:47
Dave, I’ve done exactly the same as you. Got a little metal spring and metal plate loose fromt he battery part of the casing and haven’t got a clue where they go back. I’m confident I can put it back together again but just need to know where these 2 tiny parts go. Did you have any luck your end? Can anyone else help? Thanks
June 1st, 2010 - 08:41
Dave- I’ve fixed my watch now with a little patience and thinking. I managed to work out where those pieces went and put it back together and its working perfectly. Let me know if you want guidance on where those two metal parts go.
June 3rd, 2010 - 18:28
I’m having the same problem, can you please tell me where the unusual shaped spring goes? Thanks
June 7th, 2010 - 15:56
Mike -
I have the same problem, can you post a pic or description where that piece fits?
Thanks a million.
Vince
July 24th, 2010 - 15:54
Mike,
I pulled the whole assembly apart before I found this website. Now, as you describe, I have a small spring and a small metal piece that looks like it might provide 2 electrical contacts. I know it was at the side of the battery and it came out when I popped the battery out. Do you have a picture or description than can help me identify where and how these 2 peices (spring and metal piece) are re-inserted? Thanks.
May 11th, 2010 - 13:30
Best directions I’ve found anywhere and the pictures are very helpful, especially when you enlarge them. Note that the picture showing the battery to the right of the watch assembly may imply that the positive side goes up. When installed, the positive side goes down toward the watch face.
June 12th, 2010 - 19:51
Really you don’t have to take internal out as in step #2, just remove the battery.
June 13th, 2010 - 15:11
Just found this site after trying to change mine. Mine won’t power up and I don’t seem to have the spring that’s being mentioned??? Looks like I’ve killed it, is there anyway I can get a replacement spring?
September 5th, 2010 - 20:18
If you put the battery in upside down it won’t work. Ask me how I know. The teeny tiny spring is in one corner and rests against the small square pad that’s on the inside of the cover plate. You can see the mark on the pad.
June 30th, 2010 - 13:50
was so carefull taking this apart, got the spring and made sure that the back plate is contacting where the spring is, but can;t get it to work, gutted.n
September 5th, 2010 - 20:19
I got the same result until I took it apart and reversed the battery.
July 4th, 2010 - 13:07
Before I found these extremely helpful instructions, I took my F6 all apart, even removed the clipped metal frame to get to the layers underneath. I replaced the battery and put everything back together, including the spring, and the battery polarity is correct (i.e. Negative is facing up towards the back of the watch). Now, the watch is completely blank. Since the old battery wasn’t completely dead, I even tried putting that one back in but the screen is still completely blank. Anyone have any ideas???
July 20th, 2010 - 09:06
Did you every figure this out? I am having the same problem. The display worked for a split second, then blank.
July 11th, 2010 - 21:40
This was very heplful. Even going to Walmart for the batteries!
Thanks
July 18th, 2010 - 16:43
Thanks, this is super helpful! The watch repair I took it to wanted to charge me $38 b/c it requires a “special battery”…considering I paid $90 8 years ago for my Polar F4, that seemed steep. I ended up paying $5 for the battery at Radio Shack for the battery and changing it using these directions in about 10 minutes.
July 24th, 2010 - 14:00
Can someone tell me where that little metal piece goes? i also had the same problem of the tiny spring and the little metal piece falling out. I know where the spring goes, but not the other piece…help! Please!
July 29th, 2010 - 08:25
Thanks this saved me both time and $$’s and since mine was out of warranty then Polar’s warnings were moot. FYI to anyone doing this you don’t lose your presets and fitness values when changing the battery. It really is as easy as the directions point out and don’t forget to add just a ‘touch’ of lube to the O ring to help renew the waterproofness and it is just a ‘touch’ (amount is equal to the head of a pin)
August 1st, 2010 - 09:30
Kevin, could you tell me what kind of “lube” for me to use to get it water-tight again? My F11 is about 2 yrs old now, and seems the waterproofing ability “died” 2 months ago. I got some moisture (water?) underneath my F11 crystal from swimming in my pool and it took well over 2 wks to dry it out again. Now, my battery is almost dead.
And, also, where is the O-ring you mentioned? Do you think the “lube” will solve my moisture problem??
August 1st, 2010 - 04:03
Hi good advises so far. Ihave a different problem. After batterie change the clock works fine. But next morning the batterie was empty again. I thougt that it might be an old batterie, so I repaeted the batterie change. Still clock works fine all funktion, good contrast,… Next morning same result. Any Ideas?
Regards Burkhard
August 1st, 2010 - 11:44
Hi Guys! A little tip. Whenever I am taking something apart that has a tendency to have lose little parts I take pictures with my camera. Then I have something to refer to, and when I’m done I just delete the pictures.
August 21st, 2010 - 09:09
These instructions worked great. Picture helped enormously especially the one showing how to disengage the battery “strap”. That had me buffaloed. All is back together and working well
August 30th, 2010 - 09:11
The pictures helped enormously. Thank´s.
One question: If the the numbers are not good to see on one side of the display, can I do something against this?