Here’s a shining example of a perverse incentive if ever there was one.
When my phone’s battery is dying, my phone decides to alert me by leaping into life and bleeping loudly whilst lighting up the big LED screen with a warning that my battery is low.
Yeah, that helps.
This warning then keeps the screen brightly lit until I acknowledge it by pressing the ‘OK’ button. Even then, it doesn’t switch to standby until I do it myself.
It’s like shouting “You’re being very quiet and stealthy!” to a ninja, mid-creep.
He knows. And now he isn’t.
Oh look, my battery has drained drastically in the last 2 minutes for some reason.
Oh look, the ninja has been stabbed through the face by the palace guards.
Head In A Blender 
Even more expensive smartphones can’t with stand a good battery life now a days. I totally hate this thing since i was using the smartphones to browse and read all the time, the battery seems dying every time.
It’s the bane of our existence. My wife has an old school Nokia phone that lasts about 3 weeks on a single charge. THREE weeks! I charge my phone twice a day.