Abstract: A mobile phone may include an enclosure defining a front exterior surface of the mobile phone, a rear exterior surface of the mobile phone, and a side exterior surface of the mobile phone. The mobile phone may further include an audio output system configured to produce an audible alert in response to the mobile phone receiving an incoming call, a momentary ringer-control button positioned along a side exterior surface of the housing component, and a processing system configured to, in response to detecting an actuation of the momentary ringer-control button while a first ringer mode of the mobile phone is active, transition the mobile phone to a second ringer mode, and in response to detecting the actuation of the momentary ringer-control button while a second ringer mode of the mobile phone is active, transition the mobile phone to the first ringer mode.

Abstract: Power adapters having a small-form factor, are capable of delivering a large amount of power, can charge multiple electronic devices, and can allocate power between the multiple electronic devices in an efficient manner.