Agreed, if it is less than 9 in the &quot;real world&quot; I&#x27;ll be pretty disappointed. The thing that makes iPads work for me is that they save a <i>lot</i> of power when they are asleep, and they come back instantly when they are woken up (very phone like in that regard). If Microsoft has given W10 that ability on their Surface hardware it could do the trick for me. (the only time I go 8 - 9 hours straight on battery is when I&#x27;m travelling)