Huawei's P20 family of smartphones is scheduled for a March 27 announcement in Paris and we're expecting three phones to go official then and there - a 'regular' P20, a Lite and a Plus (or maybe Pro?). It's this latter version that we have some new bits on, courtesy of @funkyhuawei.
The flashing/unbricking/assorted-software-tinkering service that specializes in Huawei phones has allegedly dug up P20 Plus firmware files and inside those - a mention of a 4,000mAh battery. On top of that, a reference to an always on display feature has also been found in the files.
Huawei P10 Plus - the current model
So far, only the Mate 10 Pro in the Huawei lineup has an always on display and, whaddayaknow, it's got a 4,000mAh battery too. That coincidence makes the skeptics around here think that the firmware in question has some remnants of a Mate ۱۰ Pro build and is not necessarily indicative of the P20 Plus' final form - it's still somewhat early, after all.
On the other hand, the P10 Plus has a 3,750mAh battery and a 4,000mAh power pack for the upcoming model doesn't sound the least bit outlandish. We're just wondering if the always on display means an OLED panel for the P20 Plus - it's not a requirement for the feature, but the two go quite well together. Plus, with all this talk of notches, things are starting to add up in favor of OLED.