Battery empty in the Polar Transmitter
The average battery life of the Polar T31/T61 Transmitter is 2500 hours of use. It is recommended that the transmitter battery be checked in the Polar Service Center when the battery in the receiver is changed. The whole transmitter needs to be replaced in cases where the battery is weak or empty.
You may also be in need of a transmitter replacement if you experience any of the following symptoms:
- The transmission range between the transmitter and the receiver needs to be less than 90 cm/3 ft to pick up the heart rate signal
- The heart rate reading does not appear on the display of the receiver
- The heart rate reading stays at the same value for long time
- The heart symbol does not blink.
For further information on disturbances in transmission, please see the section on Abnormal heart rate readings during exercise.
Most important: Please follow the care and maintenance guidelines below to ensure maximum life and performance of your transmitter:
- Wash the transmitter regularly after the use with a mild soap (dish detergent, hand soap) and water solution. Dry it carefully after washing with a soft towel.
- Never store the transmitter when it is wet. Sweat and moisture on the electrodes can keep the transmitter activated, which shortens the battery life unnecessarily.
- Store your Polar Heart Rate monitor in a cool and dry place. Do not store it in any kind of non-breathing material, such as a plastic bag or a sports bag, if it is wet.
- Do not bend or stretch the transmitter. This may damage the electrodes.
- Handle the transmitter with care: rough handling may damage the electrodes.
- Never use alcohol or any abrasive such as steel wool or cleaning chemicals on any part of the heart rate monitor.