1## 8.3\. Power-Saving Modes 2 3Android includes App Standby and Doze power-saving modes to optimize battery 4usage. 5 6* [H-0-1] All Apps exempted from App Standby and Doze power-saving modes 7MUST be made visible to the end user. 8* [H-0-2] The triggering, maintenance, wakeup algorithms and the use of 9global system settings of App Standby and Doze power-saving modes MUST not 10deviate from the Android Open Source Project. 11 12* [T-0-1] All Apps exempted from App Standby and Doze power-saving modes 13MUST be made visible to the end user. 14* [T-0-2] The triggering, maintenance, wakeup algorithms and the use of 15global system settings of App Standby and Doze power-saving modes MUST not 16deviate from the Android Open Source Project. 17 18* [A-0-1] All Apps exempted from App Standby and Doze power-saving modes 19MUST be made visible to the end user. 20* [A-0-2] The triggering, maintenance, wakeup algorithms and the use of 21global system settings of App Standby and Doze power-saving modes MUST not 22deviate from the Android Open Source Project. 23 24* [SR] All Apps exempted from these modes are STRONGLY RECOMMENDED to be made 25visible to the end user. 26* [SR] The triggering, maintenance, wakeup algorithms and the use of 27global system settings of these power-saving modes are STRONGLY RECOMMENDED NOT 28to deviate from the Android Open Source Project. 29 30In addition to the power-saving modes, Android device implementations MAY 31implement any or all of the 4 sleeping power states as defined by the Advanced 32Configuration and Power Interface (ACPI). 33 34If device implementations implements S3 and S4 power states as defined by the 35ACPI, they: 36 37* [C-1-1] MUST only enter these states when closing a lid that is physically 38 part of the device. 39