7. BlackBerry KeyOne
Battery life under heavy load: 12 hours 47 minutes
Battery: Non-removable Li-Ion 3505 mAh battery
The BlackBerry KeyOne is one of BlackBerry’s latest offerings to the smartphone market. It is true that BlackBerry has fallen out of favor with its customer base, as the norm nowadays is to have a touchscreen and not the qwerty keyboard, which was BlackBerry’s main selling point. Also, the proprietary BlackBerry OS is no longer a favorite. Instead Android is all the rage right now. The KeyOne offers the latest Android 7.1 Nougat, an amazing 1080 x 1620 pixels resolution 4.5 inch IPS display, along with a full qwerty keyboard. But the standout feature of this remarkable smartphone is its awesome battery life, which under heavy usage lasted for over 12 hours.