In any case, the best would be to test this on iOS 26, and send us some diagnostic logs if it is not working correctly.
iOS 26 has a new way of handling battery updates, and will be the way going forward.
To create a diagnostic log, please go to https://developer.apple.com/bug-reporting/profiles-and-logs/ and follow the instructions for Bluetooth for iOS to install a logging profile on your device.
Then, once the logging profile is installed reproduce the problem, keeping track of the actual time of the actions you take and the result you see.
Once the problem is reproduced, follow the instructions at the above link to trigger a sysdiagnose
Then use http://feedbackassistant.apple.com to create a feedback report, include all relevant information and attach the sysdiagnose from the above step.
Once created, please post the Feedback ID here and @ mention me so I can forward it to the Bluetooth team.