[HTC 10 Guides, News, & Discussion] Haldi4803:
Powermeasuring:

How do we know how much power our device is using right now?

the Ampere App shows a rough estimate, Qualcomm Trepn profiler shows a better BatteryPower value.

The best way would be to dismantle the phone and use hardware on the wire between battery and phone.

This does seem a little bit extreme so there is another way, plug the phone to the wallcharger and measure how much the charger draws.

So.... are all these measurements accurate?

I've done the comparison: While being plugged to the wall what does the Hardware say, what does Trepn Profiler say.

One thing needs to be said here. On SD810 and onwards Qualcomm decided to limit the "Direct BatteryPower" to once every 30 seconds. If you want a faster update you need "estimated BatteryPower*", thats also what is used when the phone is connected to a charger.

So i did one Benchmark (Stability Test v2.7 CPU Bench) while connected to the Wallcharger at 100% and transfered the info via bluetooth to my phone, at the same time run Trepn Profiler in estimated* mode.

To make sure being connected to the charger does not make a difference i've unplugged the phone and did another run in estimated* mode.

Then i made the 3rd run unplugged while using direct batterypower mode.

Here is the Graph of all 3 runs consolidated into one:

[IMG="StabilityTest v2.7 Powerdrain Benchmarks"]http://i.imgur.com/mC1Cp5Y.png[/IMG]

As you can see the Estimated* graph is far off from the direct and wallcharger. (EDIT: Seems like the early version of Trepn had issues with Big cores Clock and other stuff so estimated usage was totally off)

The problem with the direct mode is that it only gets updated once every 30 seconds, so to get accurate results you need to have stable conditions for 30s or more.

So yeah.... thats the situation under heavy load. But what about Idle?

Maybe it works better when idle? Nope.

I've set manual Brightness to the minimum. Activated Flightmode, disconnected WiFi (bluetooth still active for measuring.....) Screen timeout to 1h and left the phone alone for 10 minutes on the Homescreen.

[IMG="Powerdrain Idle Situation"]http://i.imgur.com/ALBaM3H.png[/IMG]

Same problem here. The Wallcharger shows way more than direct which is also way over estimated mode.

Why is the charger so much more? No idea. I've made sure the phone was on 100% battery, and the Powermeter shows 0.032A and 5.93V so about 0.19W when the screen is off.

Here are the Screenshots that show CPU load and Frequencies.

Estimated run while plugged:

https://drive.google.com/file/d/15YLBTjgcK69qNvL14Ubn67qlmuzEn68HLQ/view?usp=sharing

https://drive.google.com/file/d/1nVwAFMrJDhcYhor0Bq9oDLDgg4alF8vzWg/view?usp=sharing

Direct Power run while unplugged:

https://drive.google.com/file/d/1wgrCGWa1afsjjXBXmqxPkxauL_zbS9YsRg/view?usp=sharing

https://drive.google.com/file/d/1mHo6uV0BuAgj7HDHPgurRVZAxeuifPBMJw/view?usp=sharing

I've contacted the Dev's from Qualcomm and asked what they have to say about this, because their last statement was "estimated mode should be fairly accurate"

(EDIT: Seems like the early version of Trepn had issues with Big cores Clock and other stuff so estimated usage was totally off)