How to change the battery of Tronin AC/DC oxygen pump?

Tronin AC/DC Oxygen Pump battery change steps are as follows.

1. Locate the battery compartment and battery socket. The battery compartment is usually located at the bottom of the device and is the same size as the battery, gently push the battery compartment cover piece with your hand.

2. Remove the old battery. Be careful not to use excessive physical force when removing the old battery. You can gently pull the battery off the socket with your hand or a tool.

3. Insert the new battery. Insert the new battery into the battery compartment in the specified direction, being careful not to reverse the interface position. Align the battery socket in the battery compartment and gently insert the new battery.

4. Close the battery compartment cover tab to make sure the battery has been installed correctly. Lock the battery compartment cover tab.