Why is my Smart Door Lock not powering up?

Why is my Smart Door Lock not powering up?

There could be many reasons why your smart door lock is powering up.

Following are some troubleshooting steps:

First use the emergency USB power port to power up the lock - Follow the instructions on this article to power up your lock using a USB cable. If this works, that means the exterior panel is working but the power is not coming through from the interior panel. 

Next try the following troubleshooting steps:
  1. Make sure you have installed good quality brand-new batteries.
  2. Check the battery polarity (i.e. + and - ) is correct.
  3. Check if the cable connecting the interior and the exterior panel is connected correctly. You can remove it and plug it back in.
  4. Inspect the cable and connectors for any broken or loose connections.
  5. Check for any rust or damages to the battery terminal
Idea
If the steps above do not solve the problem, please send us the following.
1. Short video demonstrating the issue
2. Photo of the power cables
3. Photo of the battery terminal with the batteries installed
4. Photo of the battery terminal without the batteries
5. 
Video of powering the lock with a USB cable