Nike + iPod: About the sensor battery
Summary
The Nike + iPod Sport Kit includes the Nike + iPod Receiver and the Nike + iPod Sensor. The sensor contains a non-replaceable battery. The sensor’s battery has a life of more than 1000 active hours. The sensor has a sophisticated built-in power management system which means that the sensor really only consumes power when active (that is, when it senses motion).
Products Affected
Nike + iPod Sport Kit
The sensor sends a low battery signal when there is approximately 2 weeks of life remaining (based on usage pattern), indicating that the sensor needs to be replaced. When this happens, a low battery icon will flash on and off in the Now Running screen:

To check the status of the sensor battery when not working out:
- From the Main menu choose Extras > Nike+iPod > History > Totals.
- Look for the message "Battery Low" in the Totals screen.
- If the “Battery Low” message is displayed, the sensor battery is almost or may have already been completely depleted.
- Visit your local Apple retail store for a replacement kit. You will need to replace both the receiver and sensor.
Additional Information
For more information on the Nike + iPod Sport Kit, see the Nike + iPod Sport Kit User’s Guide.