Huawei WATCH 2 Faq page 5

(5).Disable the Always-on screen setting
Go to Settings > Display, and disable Always-on screen.
(6).Disable the Tilt-to-wake setting
Go to Settings > Gestures, and disable Tilt-to-wake.
(7).Enable Watch mode.
Press the power button and then enable Watch mode in the Battery app.
Tip: Watch mode keeps only the basic Clock and Pedometer functions, prolonging the
watch's standby time.
5:How long will the Watch's battery last when Workout mode is enabled?
When Workout mode is enabled, your watch's battery should last for more than six hours,
or long enough to complete a marathon.
6:Does HUAWEI WATCH 2 have a sleep monitoring function?
HUAWEIWATCH 2 does not currently support sleep monitoring.