Not only that, but if you cannot use regular batteries in your device as well as rechargeable ones, the device may have to be sent in to be upgraded. That means being without for who knows how long. My hearing aid uses regular batteries. My cochlear processor has rechargeables, but also has a 'battery cage' that fits like the batteries do. I can use regular batteries if needed , and I often do. While having rechargeable batteries seems to be 'an advancement', I'm not so sure. When traveling it's a lot easier to have a supply of regular batteries rather than a half dozen chargers for all the stuff we tend to haul around that needs charging! 🙂 Two steps forward; one step back. And yes, always lots of $$.