Based on a Microsoft Edge benchmark test conducted by Dell labs in July 2016 with system brightness set to 150-nits (40%) and wireless enabledon the following websites -Amazon, Wikipedia, Microsoft Developers Blog, New York Times, CNN, Baiduand Actual battery life may be significantly less than the test results and varies depending on product configuration and use, software, usage, operating conditions, power management settings and other factors. Maximum battery life will decrease with time.