Replacing the Battery
The HRM 200 strap has a tool for opening the battery cover.
- Unsnap and remove the module.
- Locate the size-adjustment slider
on the HRM 200 strap.
The slider is also the battery cover tool.

- Insert the tool into the notches on the cover, press firmly, and turn the cover counterclockwise.
The tab
points to unlocked
.
- Remove the cover and the battery.
- Gently lift the battery out of the cover at the pry point.

- Wait 30 seconds.
- Insert the positive side of a new battery into the cover.
- Replace the cover.
NOTE: The tab must point to unlocked
.

- Insert the tool into the notches on the cover, and turn the cover clockwise.
The tab points to locked
.
- Turn over the module, and press the button to wake it up.
The LED flashes
when it is active and transmitting.