A smart-watch can include a wristband, a base, a battery and a first auxiliary component. The wristband can include a voltage line. The base can be coupled to the wristband and include a housing, a processor, and a wireless transceiver in communication with the processor. The wireless transceiver can be configured to connect to a wireless network. The battery can be coupled to the housing and be in communication with the processor and the voltage line. The first auxiliary component can be coupled to the wristband in communication with the voltage line and be powered by the battery.