Systems and methods for adaptive charge termination

A method for charging a battery cell comprising:

• deriving a charge termination value comprising:
• using at least one sensor to measure one or more environmental conditions;
• and
• using a processor to receive and process data from the at least one sensor to calculate the charge termination value for the battery cell, wherein the charge termination value comprises at least an amount of charge estimated, accounting for the one or more environmental conditions, to power the device for a period of time beginning at a predicted termination of a first recharging period and ending at a predicted beginning of a second recharging period;
• and
• providing charge to the battery cell comprising:
• using a power supply to provide energy to the battery cell;
• and
• using a charge regulator to prevent energy from being provided to the battery cell when the charge of the battery cell exceeds the charge termination value.

An electronic device comprising:

• at least one sensor to collect environmental data of an environment;
• a first data store for storing environmental data;
• a second data store for keeping battery performance history;
• a processor for accessing the data store and processing the environmental data to derive a charge termination value, wherein the charge termination value comprises at least an amount of charge necessary to power the electronic device for a period of time beginning at a predicted termination of a first recharging period and ending at a predicted beginning of a second recharging period;
• a battery cell for storing energy;
• a power supply for providing energy to the battery cell, wherein an amount of power provided by the power supply varies based upon a current state of the environment;
• and
• a charge regulator for limiting an amount of power provided by the power supply to prevent the battery cell from storing more energy than the charge termination value.