The default haptic feedback was both annoying me and using valuable battery life. Luckily, some nice people on the Acer forum found the answer. Just reposting here in the hope it will help someone else out...
Haptic feedback happens in two places - (1) the QWERTY keyboard (e.g. when you're writing an SMS), and (2) on the bottom three navigation keys.
(1) Vibrate and sound have two spots that can be toggled on and off. the first is in Sounds menu, but they are also set in the Language and Input menu for the keyboard you have set (Google keyboard).
(2) To turn off the haptic feedback on the bottom three navigation keys, you can download the Profile Scheduler app and change the settings there.
Haptic feedback happens in two places - (1) the QWERTY keyboard (e.g. when you're writing an SMS), and (2) on the bottom three navigation keys.
(1) Vibrate and sound have two spots that can be toggled on and off. the first is in Sounds menu, but they are also set in the Language and Input menu for the keyboard you have set (Google keyboard).
(2) To turn off the haptic feedback on the bottom three navigation keys, you can download the Profile Scheduler app and change the settings there.