Abstract: A portable electronic device determines a battery available power for the device's battery and manages device power usage based upon the battery available power. The device includes a battery and a controller. The controller is configured to receive a first voltage value for the battery at a first time, a first current value for the battery, a second voltage value for the battery at a second time, and a second current value for the battery. It is determined that a time difference between the first time and the second time exceeds a predetermined time threshold. An estimated resistance of the battery is determined based at least on a first difference between the first current value and the second current value and a second difference between the first voltage value and the second voltage value. Real-time power usage of the device is controlled based on the estimated resistance of the battery.

Abstract: The time remaining until a charge-based event occurs on a computing device can be determined and notification provided to the user in order to prevent a shutdown due to loss of charge, extend the lifetime of the battery, and prevent a device lockout, among other such advantages. The current charge and information about the battery and device can be used to calculate various time periods, such as the time until a 0% state of charge (SOC) whereby a user will be unable to use the device until charging, as well as the time until a 0V lockout, whereby the device will become unusable. The time period and a charge-by date can be displayed on the device at the appropriate time(s), and notifications can be generated when the device is nearing a critical state. Such information also indicates to warehouses when devices become unsellable or at least require charging.

Abstract: Devices, systems and methods are disclosed for quickly readying a device when charging a dead battery. For example, a device may enter a hibernation mode when the battery becomes critically low and may resume normal operation from the hibernation mode when an external power source is connected to the device. While the battery is critically low but the device is connected to the external power source, the device may generate a visible indication, such as a watermark, and apply the watermark to content to allow a user to control the device while indicating to the user that the battery is critically low and should not be removed from the external power source. Thus, the device may reduce user-perceived latency from when the external power source is connected to when the device resumes system interactivity (e.g., being responsive to user input).

Abstract: Method and systems for dynamic current redistribution in electronic devices with external power storage devices are disclosed. The dynamic current redistribution system includes a set of policies for each state of the electronic device. Depending on a device state, the system identifies the policies to be put in place, and directs current according to the policies. The electronic device may be connected to an external power source in one state, an external battery device in another state, and may be connected to both in a third state.

Abstract: Method and systems for configuration and control of an inter-integrated circuit (I2C) bus interface are described. An electronic device that may be connected to an external battery device via a modified connector is also described. The connector has multiple interconnect pins, and one of the interconnect pins of the connector is multiplexed to receive data operation and interrupt or signaling operation on a single line. The single line is configured to not only detect a connection with the external battery device, but also to perform data operations including read/write operations between the electronic device and the external battery device.

Abstract: A modular recharging system includes an electronic device that performs diagnostics on a removable battery pack that the electronic device can use to boost the power of its internal battery. Typically, the battery pack will have a larger battery than the internal battery of the device. The electronic device determines whether the battery pack will take a charge before determining whether the battery pack is authorized to assure that an authorization failure is not due to other issues such as a dead battery, an underpowered battery, or a broken connection between devices.

Abstract: A modular recharging system includes an electronic device that includes an internal battery, and a removable battery pack that the electronic device can use to boost the power of its internal battery. Typically, the battery pack will have a larger battery than the internal battery of the device. Based on threshold charge levels for the internal battery, the electronic device turns on and off power from the battery pack so as to preserve the life of the battery pack. Processor interrupts generated in response to the threshold levels may also be selectively masked to reduce power consumption.

Abstract: A control circuit configured to conserve battery in a mobile device is described. The control circuit upon receiving an input signal from an input sensor sends a suspend signal to the power management integrated circuit (PMIC), which may turn off power in the rest of device and keep the processor and PMIC powered on, thereby transitioning the mobile device into a suspend mode. After a predetermined period of time, the mobile device saves all processes running on the processor and registry content of the memory in a non-volatile memory on the device and shuts off the PMIC and the processor to transition into a hibernate mode. The input sensor and control circuit which receive power directly from the battery management can turn on the PMIC and the processor upon receiving an awake signal from the input sensor, thereby transitioning the device back to an awake mode.

Abstract: Systems and methods are provided for optimizing battery life in an electronic device. The device is configured to make periodic assessments of battery capacity by measuring the DC resistance value of the battery cell. The temperature of the battery cell and/or other characteristics of the device are used to determine a threshold DC resistance level. If the measured DC resistance value reaches a determined threshold level, the device can initiate a power-saving mode in which an operating parameter of the device is adjusted to decrease power consumption.

Abstract: A small capacity battery for powering electronic devices, such as an e-book reader, is provided. This small capacity battery is designed to produce low area-specific resistance, which maintains usable operating voltages even during periods of high current draw. As a result, a lighter and smaller form-factor battery may provide the same battery capacity as a larger and heavier conventional battery. A user may then be provided with a lightweight and small form-factor electronic device that achieves an extended battery life.

Abstract: Systems and methods are provided for optimizing battery life in an electronic device. The device is configured to make periodic assessments of battery capacity by measuring the DC resistance value of the battery cell during the execution of a power-consuming operation. If the measured DC resistance value reaches a threshold level, the device can initiate a power-saving mode in which an operating parameter of the device is adjusted to decrease power consumption.

Abstract: Systems, methods, and computer-readable media are disclosed for dynamic current redistribution. Example methods may include determining that a power source is in communication with a first battery, determining that a second battery is in communication with the first battery, and charging the first battery at a first charging current value. Example methods may include charging the second battery at a second charging current value, determining that an input voltage from the power source is equal to or greater than a voltage threshold, and charging the second battery at a third charging current value that is higher than the second charging current value.

Abstract: A processing device of a mobile device determines an activity level for a hardware component of the mobile device based on activity information associated with the hardware component. The processing device computes a score for the hardware component based on the activity level and a power consumption value of the hardware component, wherein the power consumption value indicates an amount of power used by the hardware component. The processing device determines whether to deactivate the hardware component based on the score.

Abstract: A small capacity battery for powering electronic devices, such as an e-book reader, is provided. This small capacity battery is designed to produce low area-specific resistance, which maintains usable operating voltages even during periods of high current draw. As a result, a lighter and smaller form-factor battery may provide the same battery capacity as a larger and heavier conventional battery. A user may then be provided with a lightweight and small form-factor electronic device that achieves an extended battery life.

Abstract: Embodiments of methods, systems and storage medium associated with generating and storing a unique event identifier (UEID) associated with a type of an event of a module of a computing system are disclosed herein. Specifically, a centralized UEID storage may include one or more event nodes configured to associate a UEID with a type of an event handled by or occurring at an owner module. The centralized UEID storage may be further configured to associate, using the UEID, the type of the event with one or more callback functions of one or more client modules. Upon occurrence of the type of the event, the callback functions may be identified and invoked using the UEID.