Thank you. Guess I got the large lol
I don’t see any reason why you couldn’t do that. I do it with my cell phone periodically. It might take longer to charge the HA’s. Of course, a lot will also depend on the battery packs capability
FWIW- I bought the Phonak battery pack which attaches to the charger… it’ll provide 6 additional charge of the HA’s… My audi quoted me a price of about $100 for it, I got mine off of E-Bay for about $30.