The video - embedded above - shows a ZenFone Max and an iPhone 6s Plus, both playing movies and TV shows next to each other until they run out of juice. Apple's handset (which has a 2750 mAh battery) lasts for 5 hours and 31 minutes, while Asus' smartphone (which packs a 5000 mAh battery) goes on and on for 12 hours and 45 minutes. What Asus doesn't mention is the fact that the ZenFone Max and the iPhone 6s Plus are very different smartphones: the former offers modest features like a 5.5-inch 720p display and a Snapdragon 410 processor, while the latter sports a 5.5-inch 1080p display and is powered by Apple's high-end A9 processor - these things greatly matter when it comes to battery life.
Of course, the ZenFone Max does seem to be a nice choice for folks in need of a decent handset with long battery life. At the moment, the smartphone runs Android Lollipop, but it will soon be updated to Android Marshmallow alongside other Asus devices.