HP Slate7 Extreme official Pictures. HP Slate7 Extreme is a Smartphone of hp. The HP Slate7 Extreme Android Tablet. Announced Dec 2013. Features 7.0″ Display, Nvidia Tegra 4 Chipset, 5 MP Primary Camera, 4100 MAh Battery, 16 GB Storage, 1000 MB RAM. HP Slate7 Extreme price starts.