I bought a Nike sensor a long time ago, with the promise that I would start running/walking more often and be able to track my progress. Turns out I didn't use it and when I finally decide to give it a try the sensor was dead already. :(
Not willing to buy a new one ($20.00) value I decide to search for options.
This instructables offers my take on replacing the battery of the Nike sensor.
Disclaimer: few of the pictures are not mine and I will provider the proper credit.
Please don't forget to rate this instructables if you like it. Thank you