How to put R2-D2 into Deep Sleep
To put R2-D2 to sleep, simply close and force quit the Star Wars Droids App. The App disconnects from Droids on background, thus R2-D2 will enter sleep after 5 minutes, even if the App remains in the background without being fully closed.
To put R2-D2 into deep sleep, navigate to the setting page in the application and tap the “Sleep” button. This sleep mode is best for storing your Droid for long periods of time without use.