Systems and methods for providing redundant access control systems are disclosed. According to some embodiments of the invention, the systems and methods include a smart lock that provides redundant access control. The smart lock includes a button that has a plurality of redundant access channels for receiving authentication information. The redundant access channels may include a biometric scanner for receiving biometric information, a passcode keypad for entering a token, or a wireless transceiver for receiving a token from a mobile device and transmitting a response to the mobile device. When the user cannot open the lock through the first redundant access channel, the smart lock is configured to allow access through a second access channel. In some embodiments, the button is a freely rotating button that translates the rotational energy into electrical energy using, for example piezo elements, to energize a rechargeable power source, such as a capacitor bank.