[Huawei MediaPad X2] Benjiro:
Here are some power usage number over the last 6 days and half.

25/08 21.30: 100%

- Installing some software

- Wifi + Cell on all night

26/08 9.50: 93%

- Call 15 min

- Daily WeChat checks & talks

- Wifi ( useless, no connection ) + 2G + Cell on all day

26/08 17.44: 88%

- Some playing around

- Wifi + Cell on all night

27/08 9.22: 83%

- Call 15 min

- Lots of WeChat chatting

- Wifi ( useless, no connection ) + 2G + Cell on all day

27/08 17.23: 74%

- Wifi or 2G + Cell on all day, forgot to write down. Based upon the drop, i probably had 2G and no Wifi on.

28/08 9.22: 71%

- Some WeChat chatting & checking but low activity day

- 2G + Cell on all day

28/08 17.50: 69% << no joke .. only 2% that day??

... big gap, weekend. Forgot to write down numbers.

- Some software installing, playing round, internet usage, ... a bunch of things

- Wifi + Cell on all the time.

31/08: 08:00 ( Forgot to write down but it was in the 40% somewhere )

- GPS navigation for about 30 minutes in the car

- Wifi + 2G + Cell

31/08: 11.47 36%

- Chatting, etc ... you know the routine by now *lol*

- 2G + Cell all day

31/08 18.19: 31%

- 2G + Cell all night

01/08 9.50: 28%

...

In total my screen was on for about 5 hours according to the battery app but i have my doubts about the reporting. Sygic ( car navigation ) had run for a pure minimum of 30 minutes ( longer because i tested some things at home ), and this usage is not reported at all. And Sygic + GPS are medium/high power drainers.

My 4G/2G + Cell account for 24% of the power usage. Wifi accounts for 4%. My 5 hour screen time supposedly account for 4%...

Its not easy to get a perfect power profile because activities switch, or i forget to turn off the Wifi at work ( so its constantly wasting energy looking for a connection ), with then 4G/2G also active. Or forgetting to turn of the GPS after using the navigation.

In comparrison, my 2 year old Sony Z Ultra, this same type of activity ( minus any GPS usage because i tried to save the Sony Z Ultra from heavy work to extend its life ), resulted in about 2 days of work, before the battery started hitting close to 30 a 40% mark. At that moment i always charged up because it made me unconfortable.

On new battery, the Sony Z Ultra's life was closer to 2.5 days of activity. What is really not bad for a phone that big. Especially if we compare the battery life of most other smaller smartphone's from that time / era.

But the X2 so far is really trumping it massivly. If this was my ZU, showing 27% ( now ), i will have been like "o god, o god, need to charge it up" because its going to drain ( even doing nothing ). I do not have the same feeling with the X2.

And to be honest, i wasted a bunch of power because of the missing ability to automatically turn Wifi off, when your not near your home Wifi connection. So you end up with Wifi + xG active all the time outside. Love to install Trigger or any of the Xposed modules the moment it becomes available.

My estimate for tonight, when i officially hit day 7 ( 168 hours ), is that the phone will have 20% left. Hell, i can probably do another day and half with that. But i think that 20% is a good charge mark. Lower then that will damage the battery more easily ( if you keep low charging over time ).