User Guide

Battery Replacement

We recommend having all the service done by an authorized Polar

Service Center. However, if you wish to change the battery

yourself, please follow these instructions.

Note: If you use your Polar heart rate monitor in water, the

rubber gasket seal that ensures water resistance may have to be

replaced and the unit should be tested for water resistance

every time the seal is broken. If an unauthorized service agent

services the heart rate monitor, or if you change the batteries

yourself, Polar guarantee does not cover damage or

consequential damage that may occur.

You will need the following:

Battery: CR 2430 3V

Dust-free pad that won’t scratch the face of the wrist receiver

Small Phillips or standard head screwdriver

1. Put the unit on the clean, dust-free pad, face down.

2. Open the back by removing the four screws with the

screwdriver. Do not turn the unit upside down to remove

the back, doing so will spill out the contents.

3. Remove the back by pressing lightly on one of its corners, the

opposite corner will be raised enough to lift off the cover.

4. Leave the orange-colored gasket in its groove, or, if it is

separated, be careful not to twist it or damage it.

5. Remove the black plastic piezo case by gently inserting the tip

of the screwdriver into the slot at the upper right corner, and

gently pulling it in the direction of the wrist strap without

the buckle.

6. Take off the piezo case,

exposing the battery.

Do not handle the battery with

metal tweezers because this

could short it out.

Also, naturally occurring oils on

your fingers will shorten battery