Replaceable Modules
An Apple Watch is already designed to be fairly modular with interchangeable watch bands. But according to one patent, Apple may make future Apple Watches more modular in other meaningful ways — including battery life.
That idea comes from a recent patent describing different “modules” that would attach to a wearable’s casing and that users could easily swap. Some of the functionality that you could add could include different communication interfaces, controllers, sensor packages, additional batteries, or even I/O modules that could add something like a Lightning or USB-C connector.