Like you I’m not deaf without aids, but for me replaceable batteries were the no-brainer option for my ReSound Quattros. Well, not entirely no-brainer because I had to accept larger aids (13 battery) to avoid the rechargeables, but that’s what I decided in the end. I didn’t want to introduce another possible point of failure into what’s become an important part of my life over the past year. Yes, my audiologist provides great support, and if the charger failed she would certainly replace it ASAP, subject to logistics and supply. But I’d rather not have it be a factor at all. I replace batteries every 9 days, before they run low. Relative cost isn’t a concern for me.
@MDB, I carry a pocket-size Phonak case (smaller than the ReSound one) for my aids, with spare batteries, cleaning brush, spare domes, and wax filters. More batteries and wax filters won’t fit in the case, but they’re still very small pocket-size items. Neither the ReSound nor Phonak charger would fit in my pockets.