How to open the 3.5 door lock of Hanting Hotel without electricity?

How to open the 3.5 door lock of Hanting Hotel without electricity? Call customer service and ask the hotel customer service to open it.

1, some smart locks can be charged by an external power supply, such as an external power supply (9V battery or Micro USB charging treasure) to temporarily supply power to the system, so that users can replace the battery as soon as possible after opening the door.

You can use the emergency battery box. First, install four No.5 batteries in it, then insert the emergency battery box into the emergency battery box jack of the password lock, then open the electronic lock and replace it with the batteries in the normally available cabinet door.

Most electronic password safes actually have two keys. When two keys are used simultaneously, in this case, the electronic lock can be opened without electricity. After opening the electronic lock, take out the battery and replace it with a new battery with electricity, and the electronic lock can be used normally.