Better than ever, the new Surface Pro is the most versatile laptop we've ever built. Completely redesigned from the inside out with all new custom parts, Surface Pro delivers more battery power, more performance, and a superior display. The stunning PixelSense display supports pen and touch, while the refined design provides 68% more battery life and 2.5 X the performance of Surface Pro 3. A powerful Intel Core processor runs full desktop software with ease, ensuring a smooth, productive workflow.
Up to 13.5 hours for video playback. Testing conducted by Microsoft in April 2017 using preproduction Intel Core i5, 256GB, 8 GB RAM device. Testing consisted of full battery discharge during video playback. All settings were default except: Wi-Fi was associated with a network and Auto-Brightness disabled. Battery life varies significantly with settings, usage, and other factors.
3DMark 11 Overall score comparison; Surface Pro i7 vs. Surface Pro 3 i7.
Applies to i5 i7 with understanding that m3 is 2g heavier.