Difficulty

Moderate

Steps

8

Time Required

                          10 - 30 minutes

Sections

1

  • Battery
  • 8 steps

Flags

Member-Contributed Guide

An awesome member of our community made this guide. It is not managed by iFixit staff.

  • BackPOLAR CADENCE SENSOR BLUETOOTH® SMART Reparatur

  • Full Screen

  • Options

  • History

  • Save to Favorites

  • Download PDF

  • Edit

  • Translate

  • Get Shareable Link

  • Embed This Guide

  • Notify Me of Changes

  • Stop Notifications

Introduction

Step 1

              The Sensor
  • Removed Cadence Senosor from frame

Removed Cadence Senosor from frame

1024

Step 2

              Cutting open the Sensor
  • Either use hacksaw or Dremel to cut open downside of the sensor. Use the carve of the body for guidance.

Either use hacksaw or Dremel to cut open downside of the sensor. Use the carve of the body for guidance.

Step 3

              Behind the circuit board lies the truth
  • After cutting the downside, sensor can easily be opened. Remove circuit board with care not to break the pin. Remove copper clamp with tweezers.

After cutting the downside, sensor can easily be opened. Remove circuit board with care not to break the pin. Remove copper clamp with tweezers.

Step 4

  • Replacing the battery

Replacing the battery

Step 5

              First test of the new battery
  • Move magnet close to diode. Flashing indicates successful replacement

Move magnet close to diode. Flashing indicates successful replacement

Step 6

              Glueing it up
  • Glue it up (maybe nicer than I did)

Glue it up (maybe nicer than I did)

Step 7

              2 Function Test
  • Second functional test with glued chasis

Second functional test with glued chasis

Step 8

  • Bonus IC Identification:
  • Texas Instruments MSP430F5502 16-Bit Microcontroller w/ 24 KB Flash
  • Nordic Semiconductor nRF8001 Bluetooth Low-Energy Transceiver

Bonus IC Identification:

Texas Instruments MSP430F5502 16-Bit Microcontroller w/ 24 KB Flash

Nordic Semiconductor nRF8001 Bluetooth Low-Energy Transceiver

To reassemble your device, follow these instructions in reverse order.

Cancel: I did not complete this guide.

Author

                                      with 1 other contributor 


                    Milena Haiges

Member since: 04/06/2021

1,213 Reputation

                                      3 Guides authored                  



                       Badges:
                       20







                                                        +17 more badges

Team

                       iFixit EU Team                        

                                                  Member of iFixit EU Team 



                    Community                     


                                            51 Members                     


                                            4,978 Guides authored

Albert - Jul 20, 2021

Reply

I used a razor blade in a box cutter knife (very carefully!) to gradually cut through the glue in the seam at the bottom of the device. It took many careful, small cuts to finally cut through so I could carefully pry the device open. After replacing the battery and testing it, I glued it back together with a crafting hot glue gun. This type of hot glue is waterproof, but you need to make sure there is no gap around the entire device seam. I was able to make a reasonable seal all around the device, and then I used a vice clamp to hold it together for drying. Next is outdoor testing.