The results of this test make me question some of the design decisions made during the creation of the Tab S2. It's almost a given that this result is due to the power required by the display, as the high level of white on a common web page will increase AMOLED power consumption dramatically.
At 6.07 hours, it's our second lowest result, beating only the Dell Vewhich I noted for having exceptionally poor web browsing battery life. Our web browsing battery life test is mostly display bound, and the Tab S2 does not fare well during it. However, there's really no way to gauge battery life just by looking at a device's battery capacity, and so we turn to our standard suite of battery tests which includes a WiFi web browsing rundown, a video playback test, BaseMark OS II's battery test, PCMark's battery test, and GFXBench 3's battery test. What's also concerning is that the original Tab S tablets had some battery life issues of their own. The original Tab S tablets were already very thin, and with both Tab S2 tablets again being the thinnest in their class Samsung has had to reduce the battery capacity of each model. When the Tab S2 was originally announced I saw concerns regarding the battery capacity of both models. While this can be offset by reductions in overall platform power, if it isn't offset the tablet can struggle to last throughout the day even when performing relatively lightweight tasks. However, as manufacturers have tried to slim down their tablets and reduce their mass, they have had to decrease the sizes of the batteries they include. Even the original iPad was rated for ten hours of usage, and most tablets from various vendors tend to hit or exceed this target in workloads like web browsing and watching video. Modern tablets typically haven't struggled to last users through the day.