He doesn't care how long the total life span is. It's perfectly capable of it (access to the option can be paid for so it's not equivalent to a hack) and he wants to go further on a single charge, so this is a perfectly reasonable tradeoff to make.
Just let the user make that choice without an absurd subscription.
Phones are designed that way as a way to prolong the longevity of the phone. This bike is designed this way as a way to extract a subscription. These two things are not the same.
In this scenario, have them do step 3..
3) push the button a second time.
I don't see anything inconsistent with a subscription if the manufacturer is responsible for replacing the battery during a warranty time. I prefer large ecosystems with 3rd party parts to dealing with proprietary manufacturing and warranties though.
This is some serious "c-suite message to help you fall asleep at night territory".