I'm a housewife http://fuq.in.net/ fucktube The phone's sleek unibody design means the 2,330mAh battery is sealed inside. Sony includes a suite of power management software, which this phone definitely needs. Without any power-saving tools turned on, the Xperia Z lasted for 7 hours and 47 minutes of talk time, which is okay, but a few hours short of the Galaxy S 4.