Motorola is said to have a new premium phone in the works with the code-name "Nio". It also has a rumored model number (XT2125), which has shown up on the Federal Communications Commission, (FCC) website. This new leak may thus confirm the device will launch soon with a 20 watt (W) power brick and a 5000mAh battery.
https://www.notebookcheck.net/The-Motorola-Nio-phone-will-ship-with-a-5000mAh-battery-and-a-20W-power-brick-new-leak.514860.0.html