Abstract: A method includes determining an amount of energy in a consumable energy source, such as a battery, that forms part of a device. The method further includes facilitating selection of a next software boot mode for the device from a plurality of possible software boot modes based at least on the determined amount of energy in the consumable energy source. The next software boot mode can be, by example, one of booting a reduced energy user interface enabling the composition and storage of at least one message, booting a reduced energy user interface with a communication protocol stack enabling the composition and transmission of at least one message, and booting a communication protocol stack enabling the transmission of at least one stored message.

Abstract: Disclosed herein is an apparatus. The apparatus includes electronic circuitry and a noise cancelling system. The noise cancelling system is connected to the electronic circuitry. The noise cancelling system includes a positioning interface. The noise cancelling system is configured to provide a noise cancelling signal based on, at least partially, the positioning interface.