Presented herein are techniques for adapting/adjusting the end-of-charge (termination) voltage of a rechargeable battery integrated in an auditory prosthesis or other electronic device based on an estimated power consumption of the auditory prosthesis or other electronic device. In particular, the estimated power consumption of an auditory prosthesis or other electronic device is used to set an end-of-charge voltage that is customized to the power consumption needs of the auditory prosthesis or other electronic device.