Abstract: An electronic device may have a power system. The power system may receive power such as wireless power or wired power and may use a portion of the received power to charge a battery. Power consumption by control circuitry in the device can be adjusted by deactivating or activating processor cores in the control circuitry and by selectively starting or stopping software activities. By selectively reducing power consumption by circuitry in the electronic device other than battery charging circuitry in the power system that is charging the battery, additional power may be made available to charge the battery and/or battery capacity can be extended. The electronic device may reduce non-battery-charging activities in the device in response to information gathered with sensors such as motion and temperature information, information from the power system, information on device location, information on software settings, and other information.

Abstract: An electronic device may have a power system. The power system may receive power such as wireless power or wired power and may use a portion of the received power to charge a battery. Power consumption by control circuitry in the device can be adjusted by deactivating or activating processor cores in the control circuitry and by selectively starting or stopping software activities. By selectively reducing power consumption by circuitry in the electronic device other than battery charging circuitry in the power system that is charging the battery, additional power may be made available to charge the battery and/or battery capacity can be extended. The electronic device may reduce non-battery-charging activities in the device in response to information gathered with sensors such as motion and temperature information, information from the power system, information on device location, information on software settings, and other information.

Abstract: An electronic device may have a power system with a battery. The power system receives power such as wireless power or wired power and uses a portion of the received power to charge the battery as needed. Control circuitry in the portable electronic device is used to run background processes such as image processing tasks, data synchronization tasks, indexing, and other background processes. In some circumstances, such as when the battery is below a certain state of charge threshold, background processes may be stopped so that the battery is charged as fast as possible. Once above this initial state of charge threshold, background processes may be performed during charging as long as the temperature and state of charge of the battery do not exceed safety temperature and safety state of charge values. Performing background processes in these conditions ensures requisite background processing tasks are completed while preserving battery health.

Abstract: An electronic device may have a power system. The power system may receive power such as wireless power or wired power and may use a portion of the received power to charge a battery. Power consumption by control circuitry in the device can be adjusted by deactivating or activating processor cores in the control circuitry and by selectively starting or stopping software activities. By selectively reducing power consumption by circuitry in the electronic device other than battery charging circuitry in the power system that is charging the battery, additional power may be made available to charge the battery and/or battery capacity can be extended. The electronic device may reduce non-battery-charging activities in the device in response to information gathered with sensors such as motion and temperature information, information from the power system, information on device location, information on software settings, and other information.

Abstract: An electronic device may have a power system with a battery. The power system receives power such as wireless power or wired power and uses a portion of the received power to charge the battery as needed. Control circuitry in the portable electronic device is used to run background processes such as image processing tasks, data synchronization tasks, indexing, and other background processes. In some circumstances, such as when the battery is below a certain state of charge threshold, background processes may be stopped so that the battery is charged as fast as possible. Once above this initial state of charge threshold, background processes may be performed during charging as long as the temperature and state of charge of the battery do not exceed safety temperature and safety state of charge values. Performing background processes in these conditions ensures requisite background processing tasks are completed while preserving battery health.

Abstract: An electronic device may have a power system with a battery. The power system receives power such as wireless power or wired power and uses a portion of the received power to charge the battery as needed. Control circuitry in the portable electronic device is used to run background processes such as image processing tasks, data synchronization tasks, indexing, and other background processes. In some circumstances, such as when the battery is below a certain state of charge threshold, background processes may be stopped so that the battery is charged as fast as possible. Once above this initial state of charge threshold, background processes may be performed during charging as long as the temperature and state of charge of the battery do not exceed safety temperature and safety state of charge values. Performing background processes in these conditions ensures requisite background processing tasks are completed while preserving battery health.

Abstract: An electronic device may have a power system with a battery. The power system receives power such as wireless power or wired power and uses a portion of the received power to charge the battery as needed. Control circuitry in the portable electronic device is used to run background processes such as image processing tasks, data synchronization tasks, indexing, and other background processes. In some circumstances, such as when the battery is below a certain state of charge threshold, background processes may be stopped so that the battery is charged as fast as possible. Once above this initial state of charge threshold, background processes may be performed during charging as long as the temperature and state of charge of the battery do not exceed safety temperature and safety state of charge values. Performing background processes in these conditions ensures requisite background processing tasks are completed while preserving battery health.

Abstract: An electronic device may have a power system with a battery. The power system receives power such as wireless power or wired power and uses a portion of the received power to charge the battery as needed. Control circuitry in the portable electronic device is used to run background processes such as image processing tasks, data synchronization tasks, indexing, and other background processes. In some circumstances, such as when the battery is below a certain state of charge threshold, background processes may be stopped so that the battery is charged as fast as possible. Once above this initial state of charge threshold, background processes may be performed during charging as long as the temperature and state of charge of the battery do not exceed safety temperature and safety state of charge values. Performing background processes in these conditions ensures requisite background processing tasks are completed while preserving battery health.

Abstract: A method is disclosed. The method can include receiving a command to shut down an electronic device based on a measurement of power delivery to the electronic device. After receiving the command to shut down, the method can determine whether an indication of remaining power capacity at the electronic device exceeds a threshold value. The method can shut down the electronic device and, after shutting down the electronic device, in accordance with a determination that the indication of remaining power capacity exceeds the threshold value, automatically reboot the electronic device. In accordance with a determination that the indication of the remaining power capacity does not exceed the threshold value, automatically rebooting the electronic device can be foregone.

Abstract: Battery packs that include multiple battery cells that may be monitored using a reduced amount of circuitry and battery systems that may account for battery cell changes over aging and temperature.

Abstract: An electronic device may have a power system with a battery. The power system receives power such as wireless power or wired power and uses a portion of the received power to charge the battery as needed. Control circuitry in the portable electronic device is used to run background processes such as image processing tasks, data synchronization tasks, indexing, and other background processes. In some circumstances, such as when the battery is below a certain state of charge threshold, background processes may be stopped so that the battery is charged as fast as possible. Once above this initial state of charge threshold, background processes may be performed during charging as long as the temperature and state of charge of the battery do not exceed safety temperature and safety state of charge values. Performing background processes in these conditions ensures requisite background processing tasks are completed while preserving battery health.

Abstract: An electronic device may have a power system. The power system may receive power such as wireless power or wired power and may use a portion of the received power to charge a battery. Power consumption by control circuitry in the device can be adjusted by deactivating or activating processor cores in the control circuitry and by selectively starting or stopping software activities. By selectively reducing power consumption by circuitry in the electronic device other than battery charging circuitry in the power system that is charging the battery, additional power may be made available to charge the battery and/or battery capacity can be extended. The electronic device may reduce non-battery-charging activities in the device in response to information gathered with sensors such as motion and temperature information, information from the power system, information on device location, information on software settings, and other information.

Abstract: Battery packs that include multiple battery cells that may be monitored using a reduced amount of circuitry and battery systems that may account for battery cell changes over aging and temperature.

Abstract: A system may have a power adapter with multiple ports for supplying power to electronic devices. The electronic devices may include devices such as cellular telephones, wristwatch devices, laptop computers, and tablet computers. The power adapter may supply power using wired links and wireless links. An online user account that is maintained on computing equipment in the system can communicate with the electronic devices or power adapter over a communications network. The power adapter and other components of the system may gather information such as user device charging priority settings, battery charge state information, device type information, usage history information, calendar information, and other information. This gathered information may be used in identifying an optimum power transfer strategy for the power adapter to use in transmitting different amounts of power to each of the electronic devices.

Abstract: An electronic device may play audio content to a user through a pair of earphones. The audio content may be content that is stored locally on the electronic device or may be streaming content that is provided by an online service. Control circuitry in the electronic device may monitor ear presence sensor structures in the earphones to determine whether the earphones are present in the ears of the user. In response to determining that the earphones have been removed from the ears of the user, the control circuitry may communicate with the online service provider. Communicating with the online service provider may include sending media streaming control commands to the online service provider. The media streaming control commands may, for example, include media streaming pause commands that instruct the online service provider to pause the audio content in response to the earphones being removed from the ears of the user.

Abstract: An electronic device may play audio content to a user through a pair of earphones. The audio content may be content that is stored locally on the electronic device or may be streaming content that is provided by an online service. Control circuitry in the electronic device may monitor ear presence sensor structures in the earphones to determine whether the earphones are present in the ears of the user. In response to determining that the earphones have been removed from the ears of the user, the control circuitry may communicate with the online service provider. Communicating with the online service provider may include sending media streaming control commands to the online service provider. The media streaming control commands may, for example, include media streaming pause commands that instruct the online service provider to pause the audio content in response to the earphones being removed from the ears of the user.

Abstract: An electronic device may play audio content to a user through a pair of earphones. The audio content may be content that is stored locally on the electronic device or may be streaming content that is provided by an online service. Control circuitry in the electronic device may monitor ear presence sensor structures in the earphones to determine whether the earphones are present in the ears of the user. In response to determining that the earphones have been removed from the ears of the user, the control circuitry may communicate with the online service provider. Communicating with the online service provider may include sending media streaming control commands to the online service provider. The media streaming control commands may, for example, include media streaming pause commands that instruct the online service provider to pause the audio content in response to the earphones being removed from the ears of the user.

Abstract: Automatic language switching may use information obtained from a received message to select a proper language for creating an electronic message automatically, based on at least one of language information associated with the user, language information associated with the recipients, and language information extracted from a previously received message. A user may override the automatically selected language if desired. Information about what languages are known by the user may be inferred based on the language information extracted from a received message. Adaptive techniques may be used to limit or control which languages may be selected or offered for selection, based on previous user interactions.