Hotel card lock when the voltage is too low, can?

When the hotel card locks working voltage is less than 4. 8 v, hotel door locks will hear an automatically in the process of opening the door & other; Drop & throughout; “ Drop & throughout; “ Drop & throughout; Three whistles, said credit card door lock state of low pressure alarm. In this case, the need for replacement card door lock of the battery. If the system detects that the battery voltage is lower than the door lock control chip, the door automatically switches to lock the door when you leave. And need key to open the door and replace new battery. New battery normally available a year or so, slight differences between different brand.
The importance of bluetooth hotel lock has increased as hotel electronic lock have become a must in our daily life.
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