Polar Battery Set for HR sensors FT40, FT60, FT80, FA20, RCX3

ok, so to make it clear, the package consists of one plastic cover ( for wearlink only) two seals (one for use with wearlink, the other one if you wish to install battery in polar FT or FA) and third element Panasonic battery 2025 3v . So as long as you plan on using your purchase in wearlink or FT/FA watches the purchase is worth it as will ensure waterproof function (provided seals). if you however plan on using it in H1 sensor , only battery on its own is advised by the manufacturers and in this case it makes more sense to buy pack of 12! of Panasonic 2025 3V for 2.99£- 9£ depending on supplier. I needed it for my monitor so I'm good :) . One star less as description should be more detailed. hope it helps.

Fantastic service no matter the size of the order. Always my first stop for anything from the Polar stable.

Nice Polar packaging and a tiny new seal. That's why you pay over five times the price for a Panasonic CR2025 battery.I'm glad to have my FT80 working again but never again am I wasting my money.Fitting was easy. A £2 coin and a metal toothpick was all I needed. The old seal looked in good condition but I'm always dubious about using such things.

really dont need this unless you're getting your watch wet. just buy the batteries otherwise!