Not sure how he is testing that, because the DS4 only contains (1) small LED and it is only capable of pulling 20mAh. So the light would last 50 hours fully lit all by itself. In a 4 - 6 hour period it could only use 80 - 120mAh of 1000mAh.
You can see that the DS4 lightbar at full uses almost exactly 20mAh by watching the test in this link:
http://www.psdevwiki.com/ps4/DS4_Mods
In the link he tests it once with the light on and once with it off. The DS4 contains a 1000mAh battery that lasts 9 Hours and 30 Minutes with the light bar on. With the light bar off the battery last 11 Hours and 20 Minutes. A roughly 20% increase in battery life, reaffirming the ~20mAh of the LED.
So as I said before, if you went from the current 'dim' setting on the DS4 to no LED at all, you would get about a 10% increase in battery life. They can take the light away, but it is only going to give you a little over an hour more life. If they want to increase controller life, they have to put in a bigger battery. a 2400mAh battery would give you about 15 - 20 hours of random gameplay and video watching, which should be more than enough to make it through a full day of gaming with a re-charge each night (Unless you are doing a marathon, then that is well beyond normal use, and there ain't no way they will do that for the few that would ever utilize it).
Stop hate, let others live the life they were given. Everyone has their problems, and no one should have to feel ashamed for the way they were born. Be proud of who you are, encourage others to be proud of themselves. Learn, research, absorb everything around you. Nothing is meaningless, a purpose is placed on everything no matter how you perceive it. Discover how to love, and share that love with everything that you encounter. Help make existence a beautiful thing.
Kevyn B Grams
10/03/2010
KBG29 on PSN&XBL