Wireless web browsing: Based on the BrowsingBench benchmark test conducted by Dell labs in September 2015 with system brightness set to 150-nits (40%) and wireless enabled. For more information about BrowsingBench, visit www.eembc.org. 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.