"minimum of 2 hours" - each day? For this project only? For how long? I have 5 devices - testing will be performed unsing only one: Android mini TV MK809II, Android 4.2.2, stock ROM, no root; FlyTouch 3, Android 2.2, custom ROM Tim6a, root; LG P500, Android 4.0.4, custom ROM CyanoMatZ for P500, root; Motorola Motoluxe, Android 2.3.7, stock ROM, no root; Vodafone 875 (Alcatel Smart Mini), Android 4.1.1, stock ROM, no root.