Apple might use the battery as a haptic engine in its future Watches

According to another patent recorded with the US Patent and Trademark Office, Apple is investigating the alternative of making its future Watch more slender by eliminating the haptic input motor through and through. 

However, since the haptic input is vital for the client experience, the organization needs the actual battery to assume control over that job. It portrays a "moving battery segment" that gives the haptic input. 

By eliminating the vibration engine, Apple may let loose some space and make the actual battery greater and eventually improve battery life. Or on the other hand the producer has some different designs to use the free space. On the other hand, the patent probably won't appear into an end result so the truth will surface eventually.