Adaptive battery management

A system comprising:

• a processor;
• and
• a storage medium storing instructions which, when executed by the processor, cause the system to:
• obtain a battery charge level of a battery of a battery-powered user device;
• access user data reflecting haptic output by the battery-powered user device during previous usage by a user of the battery-powered user device;
• predict future usage by the user of the battery-powered user device;
• and
• based on the battery charge level and the haptic output by the battery-powered user device during the previous usage, trigger a charging notification for the battery-powered user device prior to the future usage.

A computer-readable storage medium storing instructions which, when executed by a computing device, cause the computing device to perform acts comprising:

• based on user data, identifying a plurality of candidate notification windows for outputting a charging notification to a user of a battery-powered user device;
• determining that the user has downloaded at least part of a particular application;
• predicting that the particular application will be used during a predicted future usage session based on the user having downloaded the at least part of the particular application;
• based on the predicted future usage session, choosing a selected notification window from the plurality of candidate notification windows;
• and
• triggering the charging notification for the battery-powered user device to occur during the selected notification window.