Firstly, we would propose you try the following to charge your bike computer in case it is out of power.
- Charge your bike computer by using different USB cables.
- Charge your bike computer for at least 10 minutes.
If your bike computer can't be charged, you may try contact with support at email@example.com with the following information to start warranty:
1. Purchase date:
2. Shop link:
3. Purchase ID: