Let’s not forget that with just 30 minutes of charging, you can regain 25% of the charge or up to 6 hours.
Even if you’re gone from work all day, it should be easy when you get home to find 15 or 30 minutes of down time where you can just flop them into the charger for a short period of time to replenish just enough to last until the end of the night.
And let’s not forget that 16 hours is with heavy streaming already. So unless you spend much less than 8 hours a day sleeping and spend all your waking hours wearing the More, the risk of having 16 heavy streaming hours not being enough to last you through the day is almost nil.
In my opinion, the strategy of taking just 15 or 30 minute down time some time after you get home from work to top it off just enough to last through the rest of your day (even an unlikely necessity unless you sleep less than 8 hours a day) is much better than a strategy where you keep a spare pair charged up to swap when necessary.
Even trying to swap spare batteries in and out of the hearing aid every other day to keep them charged up like you’re proposing is already a much clunkier approach full of more hassle than just finding a 15 -30 minute down time when you’re at home to flop them into the charger to top it off, if that’s even necessary.