After the power failure, all the doors must be opened immediately, which is the requirement of the fire management, so that the sudden power failure of the building in the case of fire, and the staff can escape immediately. Some key doors can be equipped with mechanical locks or use batteries to ensure that the door continues to use after the power failure.

Our special access control power supply is with charge and discharge function, that is, the backup power supply UPS function, as long as the external a standard 7AH/12VDC battery can ensure that a card reader, a controller, an electric lock after the power failure to continue to work 4-8 hours

If the customer requires a longer backup power supply, several batteries of the same model can be charged in parallel, which can exponentially extend the discharge time of the backup power supply. However, this will make charging time longer. Generally, a battery needs 10-24 hours to be full of power, and if it is charged in parallel, it will require a longer charging time, but there is no need to worry about this, because customers generally do not often lose power.