CadNYC demonstrates how to open the Nike iPod sensor casing. Replacing the iPod Nike sensor battery is easy and low cost with a few simple steps. First, place the sensor in a vice clamp and saw off the casing using a very thin hacksaw blade. then, open up the sensor compartment to have access to the battery. You can now remove the battery and replace it with another battery which will cost about two dollars. After you replace the Nike iPod sensor battery, use a strong adhesive to glue the cover back on the battery holder. Your sensor is now ready to be used and enjoyed.