[Big D5]

Originally Posted by Palladium

Based on what I have done this weekend (since I use my phone for work this is the first opportunity to COMPLETELY DISABLE all of the radios (airplane mode) and just use the Touch Pro as a PDA) Here is what I see. After a full charge Friday Night, I have not charged it. and still have 46% battery left as of 7pm EDT Sunday. That is with 8 hours of solid PDA use with the screen on (debugging a new app) and at least 3 hours in Power Mode D2 (unattended, Screen off but processor at full power).

That leads me to believe that the issues lie in the radio. My power usage diagnostics also show that during normal usage the power draw on the Battery is about 160mA, however whenever on a data or phone call the current draw jumps to over 500 mA.

So yes I beleive that the issues lie in the EVDO and phone Radios. From my understanding of the Qualcomm MSM platform, the radios are implemented using a separate ARM6 processor to generate the digital transmission signal for the integrated CDMA or GSM transmission hardware. The actual transmission hardware is slightly different based on flavor (and essentially the same as any standard GSM or CDMA phone), but what drives that hardware is primarily software based.

The basic software to drive the transmitter is very similar regardless of CDMA or GSM and will have to be tweeked for each carrier. Since all of the recent HTC devices have been based on essentially the same MSM platform, If I were doing the software development I would reuse the same code libraries from generation to generation (with any bug or required hardware changes). (This next statement is solely speculation) So IF a bug entered in the early implementation for the chipset, it is likely to have made it through subsequent generations since in general most users will accept battery life as what it is and not ask why it is what it is.

However, with the systems I have had to design, I have always had to ask why I am using a given amount of power and what can be done to reduce it even further. So this is something I am used to analyzing with the software/hardware systems that I work on and why it just seemed natural for me to focus in on what was drawing the power.

I think I covered all of the questions that I can speak to....

So the problem is in the ARM6 processor drivers and started in its infancy there fore have nothing to do with carrier specific additions. I thought for sure that this would be something Sprint screwed up it usually is. This being the case we know how good HTC is with these devices I would thing that HTC would have already fixed this if it was possible. There are plenty of other devices that don't use the Quailcom chip set and they have the same type of battery issues which leads me to believe that this is a universal issue not just a Quailcom HTC issue. Could it be that the radios GSM or CDMA just uses a lot of power no matter what device it is? I appreciate you knowledge and hard work in testing this, I hope that there is something that can be done but I am skeptical. The bottom line and root of the discussion is, is this a defect or just the way it is? IMHO it is not a defect, we will have to learn to live with it for now.