Advertised Battery Life
Advertisements are pretty impressive but you can only believe what you see until you take it home and try it for yourself. The NVIDIA Tegra 3 Quad Core (4 plus 1) Processor with vSMP (Variable Symmetric Processing) is manufactured to minimize stand by power consumption and, when demand increases, immediately deliver maximum quad core performance, while being intuitive enough to manage the entire workload across the four main cores. The Plus 1 is actually a fifth core called the battery saver core. In addition to these battery saving features, NVIDIA also includes Prism. NVIDIA Prism analyzes each frame image and automatically adjusts backlight intensity, without compromising the image, to reduce display power consumption.
We tested the battery life a few different ways and our results are as follows:
HD Video Playback (50% display):
The Google Nexus 7 built by ASUS with the NVIDIA Tegra 3 processor performed very close to its advertised battery life specifications. While doing our battery testing, we noticed something about the Nexus 7 that needs to be addressed. The Nexus 7 has a brilliant screen, which produces one of the most amazing images we have seen to date. (Compared to other tablets or phones we have on hand) At 50% display brightness, the Nexus is just as bright as our Lepan II at 80% and the Transformer Prime at 65%. Local file HD playback actually produced better results than advertised but we wanted to see how well a non-controlled environment affected the Nexus 7 battery life. Using Wi-Fi, which can increase battery usage, we were only able to use the tablet for a little over 4.5 hours.