[Desire General] th3:
The app - just like the ebay app or yahoo mail app - offers too much ease, speed and flexibility to forego. Had it not been for the app, I would have only read/replied XDA-Dev on weekends. Auto login, fav forum at start, no large useless spaces, fast fav topic switching -> major positives for me. Things like white text on all black is a major bonus too as this is my preferred reading since the CRT days. Typing on such large forums through the browser is an absolute PITA especially when it throws you to the top every other time you touch the field during a compose.

The point about mA vs mA is very timely indeed :)

Another Test

I just ran through a full calibration cycle and then at 100% brightness, always on, everything off/disabled, left it on a full white screen. Guess how long it lasted? The point was to compare Current Widget values we now have a good idea of to the Android Battery Usage percentages. Same everything but;

All black display = 155mA (573.5mW)

All white display = 485mA (1794.5mW)

Both averages. The battery in the second case gets very hot. Now, another bug on this ROM is that sometimes display always awake resets to off and during the testing after 1 hour, it did. However, that's no biggy as we know the time range and power values for that state. Images are here: http://img85.imageshack.us/g/screenshot26i.png/

The battery lasted 4 minutes after that, so 3h54m in total.

That means an average discharge at 1328mW-h. This is from 100% to shutdown (around 6%).

Android Battery Usage reported:

Android System 70%

Display 25% (for 2h52m)

Phone Idle 5% (for 1hr2m)

There was absolutely no system usage whatsoever (except the near-end screenshots). I just left it on the desk.

1. Power idle = 2mA (let's call it 8.0mW to be liberal, for 1hr)

= 8mW-h

If 8mW-h, then;

8mW-h / 5180mW-h = 0.15% battery was used by Phone Idle

So Android reporting 5% does not add up to what the Current Widget reports. 5% of 5180mW-h is 259mW-h, which claims standby power is 259mW i.e. 70mA.

2. Assuming Display = 100mA of 130mA idle, so 455mA of the 485mA

455 * 3.7 = 1683.5mW

It ran for 2.87hrs, so;

= 4831.6mW-h

If 4831.6mW-h, then;

4831.6mW-h / 5180mW-h = 93% battery used by the display

So once again, Android reporting 25% does not add up to what the Current Widget reports. 25% of 5180mW-h is 1295mW-h, so Android claims power in that state (100% brightness, white page, always on) was 451mW i.e. 121mA.

We already know the minimum discharge was 1328mW-h by how long the battery actually lasted so that 451mW-h is completely bogus. At 451mW-h, the battery would last 11.5h. So what is Android doing with the rest of the 66%?

Oh wait, Android reports "Android System" as 70% battery usage...

It was not possible for

anything

to consume more power than the display or anywhere close to it in that test with no usage and everything off. Current Widget values are reporting 455mA (1683.5mW) vs 121mA (451mW) by Android for the display.

To be honest, 1700mW for the AMOLED alone is very high. It's about 1000mW above the values I've seen around for such 3" displays. But I've done this test twice without any change. The actual battery runtime shows with the calcs that the power draw must be the former high value and cannot be the latter. Android Battery Usage is attributing over 65% of the Display battery usage to Android System.