I remember when you had to send your polar watch back to the company to have the battery replaced at a cost of £10+ plus postage. Now you can replace the battery yourself at a fraction of the cost by getting it from Amazon.
I bought my Polar FT4 HR monitor and watch from Amazon in July 2011. It's been excellent, but the battery ran out recently. I ordered this replacement kit, which includes a new sealing ring to ensure waterproofness. The kit arrived very promptly, within a couple of days, even though ordered using free supersaver delivery. Couldn't fault the service - excellent!
My old polar watch had to be sent away for a replacement battery when it run out. There is nothing more frustrating than waiting it return when you are 'in training'. I have bought a new polar watch with a battery that can be changed. This new battery is held in reserve.
Have bought this product from this company twice now. Dispatched on same day of purchase and delivered the next day even though I didn't pay for special delivery so really good service! Battery fits the back of the FT4 perfectly, with seal and I found it super easy to replace. Would definitely recommend.
It did the trick though I would advise taking the back off your F7 watch and that way you will be able to see the state of the current seal and may be able to get away with just a battery and save yourself some coin.
Both my sons have polar ft7 watches and I normally shop locally for battery replacements but I decided to go on line this time. It was very fast and came with not only a seal but a replacement back as well. We will return !
Easy to fit and the sealing ring woeked well - was a relief as i already had tried getting a battery from a shop and fitting it - but didn't seem to work probably because i was reusing the old sealing ring