Polar FT80, FT60, FT40, and FA20 battery Kit
High Capacity Lithium Battery Panasonic CR 2025 as specified by PolarSealing O-ring for
Polar FT40, FT60, FT80, FA20
The Battery Kit is shipped with an original manufacturer O-Ring which is important for the security of your device from leaking water.
All items are brand NEW sealed factory approved.
Battery lifetime depends highly on how much you use the product.