Perhaps you could integrate the battery into the earring part so while you're wearing one pair you can hot-swap to a fully charged pair. I like the concept though, very interesting!
It's an idea we considered seriously. But ultimately we decided that we wanted our customers to have the option of throwing away the module when it got outdated, but be able to hang on to the jewelry especially if they buy a precious metal version.
Well, hopefully they will recycle the batteries but it's a good point!