For a portable console lifetime of battery is an important factor, but the new consoles generation seem to toil over 3 hours in a standard configuration.
For my first report about the Vita PS I did my tests playing Uncharted which is quite resource intensive, and the console did not even reach 3 hours, but I've realized that depending on the use , autonomy varied widely.
So I decided to make a more accurate test to compare the autonomy of the 3DS and PS Vita. For similar test conditions, I used AV Player mode of Ridge Racer for PS Vita and 3DS. I removed 3D effect of 3DS, cut the network functions, cut down the sound and set screen brightness to low.
In this case the 3DS ran during 5 hours and 17 minutes, 40 minutes longer than the PS Vita.
This is not a big difference, and I had removed the 3D effect of the 3DS. We must also take into account that my 3DS almost a year.
