Virtually everyone keeps battery (when fully recharges him what is estimated around 5 hours long) (but of course also on the distance between console and controller dependent, so your results may vary) to the 10 to a maximum of 14 hours at me. I appreciate the useful life of a battery but also at a relatively short distance from the console to VII. 20 hours.
As you get 2, which is perfectly adequate and optimally for my purposes. Is the one empty, one changes the other, leaving the empty in the meantime on the console, charge the laptop or something else with a USB connection and power supply.
I can therefore not complain and would (if I need more batteries), buy at any time!