Polar FT7 battery: CR1632
The Polar FT7 takes one CR1632 3V lithium coin cell.
CR16323V
CR1632× 13V lithium coin cell
Also sold as DL1632, ECR1632, KECR1632 · CR1632 details
Source: Polar FT7 manual
Before you swap it
- A CR1632 is 3.2 mm thick. CR1620 looks the same from the front, but it isn't the same cell, and a thinner one can rattle or lose contact.
Quick answers
Which battery goes in the Polar FT7?
One CR1632 3V lithium coin cell.
Is DL1632 the same as CR1632?
Yes. DL1632, ECR1632 and KECR1632 are all the same cell as CR1632, sold under another name.
Will a CR1620 fit instead of a CR1632?
No. It's the same 16 mm width but 2 mm thick, against 3.2 mm for a CR1632. Use a CR1632.