Method for determining battery available power for an electronic device

A device, comprising:

• a battery;
• and
• a controller configured to execute instructions for:
• receiving a first voltage value for the battery at a first time,
• receiving a first current value for the battery,
• receiving a second voltage value for the battery at a second time,
• receiving a second current value for the battery,
• determining that a time difference between the first time and the second time exceeds a predetermined time threshold,
• determining an estimated resistance of the battery 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,
• determining an estimated maximum available power for the battery based on the estimated resistance of the battery, and
• controlling real-time power usage of the device in response to determining that the real-time power usage of the device is greater than a predetermined percentage of the estimated maximum available power of the battery.

A method comprising:

• receiving, with a controller in a device, a first voltage value for a battery in the device;
• receiving, with the controller, a first current value for the battery, the first voltage value and the first current value being measured at a first time;
• receiving, with the controller, a second voltage value for the battery;
• receiving, with the controller, a second current value for the battery, the second voltage value and the second current value being measured at a second time;
• determining, with the controller, that a time difference between the first time and the second time exceeds a predetermined time threshold;
• determining, with the controller, an estimated resistance of the battery 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;
• determining, with the controller, an estimated maximum available power of the battery based on the estimated resistance of the battery;
• and
• controlling, with the controller, real-time power usage of the device in response to determining that the real-time power usage of the device is greater than a predetermined percentage of the estimated maximum available power of the battery.