additional access codes check the health of the battery etc when an access control unit is desired that has no point of attack a wireless remote control device may be used such a wireless access device is described in u s pat no 5 617 082 this device offers a battery saver feature to reduce power consumption of the lock as it waits to receive an access code transmission two examples of wireless media used for this device are radio frequency and infrared the battery saver feature can be implemented in a number of ways a full time wherein batteries are used to power the lock b not at all wherein the power to the lock is a dc power source c a combination of these two modes wherein the power saver mode is used when it is not expected that the lock will be immediately accessed or re locked and wherein the full power mode is used when it is expected that the lock may be immediately accessed or re locked a less desirable aspect of the battery saver feature is a time delayed reaction to a lock or unlock access input the dual mode takes advantage of the power saver during long time periods when the lock most likely is not.