Huawei has been doling out teasers for the Mate 10 on its Twitter account, but it's mostly vague, aspirational stuff. There's nothing vague about this - the new flagship will have a 4,000mAh battery. Let's list its main competitors, shall we? Galaxy Note8 - nope, 3,300mAh. iPhone X - double nope, 2,716mAh. LG V30 - 3,300mAh again. Pixel 2 XL - a bit better, 3,520mAh. Xperia XZ Premium - 3,230mAh. Mi Mix 2 - 3,400mAh. We can keep going, but the simple truth is this - very few flagships, even the big ones, go above 3,500mAh batteries. So the new Mate 10 with its large battery and a 10nm...
Source: http://www.gsmarena.com/huawei_mate_10_4000mah_battery-news-27582.php