Check the date on the batteries you are buying.....they may be very old
SOURCE: can not change battery on Polar chest strap
Yes, there are a few.
1) As you may noticed, coin and even screwdriver blades are never sharp, but mostly blunt. So, sharpen the edge of the coin on a piece of sandpaper. Get hardened steel screwdriver or very sharp, pointed end file and scrape that indention (groove) to make sure the channel have straight sides, forming I_I shaped groove, but not V shaped groove. When done, insert the sharpened coin and unscrew the battery cover using some pressure as well.
2) In case if the groove is stripped completely, you will have to drill two small holes into the battery cover. Drill them 1mm from the battery cover's edge on opposite sides. Depth of holes should be 0.5 mm. Do not drill through completely. For drilling use 0.3-0.5 mm diameter drill bit.
When finished with both holes, take hardened tweezers, insert each arm into separate hole and unscrew the battery cover.
Do not forget to rate, please.
SOURCE: Error after changing battery in polar watch
Follow this link:
http://www.polar.fi/en/support/product_support?product=125
This is original Polar support site.Here you will find all the info available.
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SOURCE: Installing a new battery in a Polar F4
Follow that contact (you say pin) all the way into the movement and you will find it hooked (clipped) on the plastic hook. Take tweezers and unclip it by pulling the leg outwards from hook.
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SOURCE: Battery in a Polar F7 heart rate monitor
Hello
You can change the battery in your polar f7 if the battery is worn out.
1. Insert the tip of a pen knife into the lifting point and lifting the back up. The back of the watch is only pressed into place and will come off easily this way.
2. Grab the small clip that is extending across the surface of the battery with a pair of tweezers. Slide the tweezers toward the end that hooks down into the watch. Pull the hook end of the clip out of the watch and remove the clip from the battery
3. Match the old battery with a new one at any electronic store. The store will be able to read the writing imprinted on the battery to make sure that you get the correct battery type for your heart monitor.
4. Press the new battery into the watch making sure that the writing on the battery is facing up.
5. Press the holding clip back into place. Handle the clip with tweezers only, since it is very thin and can be bent or lost easily. Once it is in place, press the back of the watch on.
GOODLUCK
SOURCE: i need polar heart rate
In my tips and tricks page are 2 usefull tips.
#1) is a quick guide to setting your F6
#2) is a link to download the manual for free.
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