| CPC H04R 25/30 (2013.01) [G01R 31/3835 (2019.01); G01R 31/396 (2019.01); H04R 25/558 (2013.01); H04R 25/602 (2013.01); H02J 7/0048 (2020.01); H04R 2225/39 (2013.01); H04R 2225/55 (2013.01)] | 20 Claims |

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13. A system comprising:
a hearing instrument comprising a battery; and
a processing system configured to:
determine a plurality of hypothetical future state of charge (SOC) functions, each of the hypothetical future SOC functions corresponding to a respective predicted timeline in which the hearing instrument has at least one of: different device states or different durations of the device states;
estimate a plurality of preliminary amounts of time remaining until a future SOC of a battery of the hearing instrument reaches a threshold using the plurality of hypothetical future SOC functions; and
determine, based on the plurality of preliminary amounts of time remaining, a final amount of time remaining until the future SOC of the battery reaches the threshold.
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