[Touch Pro2, Tilt 2 Windows Mobile General] trancerobot:
I hooked up my TP2 to the charger after school and my phone seemed to be fine.

The battery is kinda weak these days and I should probably buy a replacement, but I haven't had anything happen quite like this...

Late in the night, I checked my phone and noticed it was in an endless loop of - vibrate, then show stock pinkish and white welcome screen (Tmobile), turn off, repeat. I vaguely remember the screen turning on and off earlier in the day, but I didn't pay much attention until now.

So, I took the SDCard out thinking it was XDAndroid messing things up, but it continued to loop on and off.

Then, I took the battery out to see if I could get it to start with just the charger. It would not. I thought this was strange, since I took the battery out while it was plugged up a few days earlier and it stayed on.

I also tried the tiny little reset button in the hopes that it would stop the loop. But of course, that didn't help.

Eventually, I pulled out my old Tmobile Dash. The old Dash booted fine yet I haven't charged it in several months. Everything about this old phone is excellent, and to this day I think it's one of HTC's finest phones.

I looked at the batteries. Same power connectors, nearly the same output. 500mAh difference between the two, but they had the same voltage. So I stuck the Dash battery into the Touch Pro 2. Unfortunately, the Dash's battery has a tiny notch on it that prevents me from using it. Looks like I could tear that off easily... but I figured it was there for a reason and looked online for solutions.

I couldn't find anything online that seemed to help.

So... I tore the little notch off of the Dash battery. It was a lot easier than I thought it would be, since it's not actually part of the battery, but instead part of the plastic wrapping around the battery.

After that I was able to line up the connectors and hold the battery in place. I didn't have to touch anything and the phone came to life.

Oh great! I thought. Then I plugged the phone to the charger and took the battery out. The phone died. I was surprised that the phone couldn't stay on as I've seen before. I tried this a few times, switching the batteries out as fast as I could.

No matter how fast I switched them, the only result would be an endless boot loop and no charge.

At least now I knew it was the battery. I had assumed it was XDAndroid (I had just installed the October kernel - which by the way is much more stable and fasterthan what's used in the July FRX07 release package).

Since Android wasn't suspect anymore, I thought I'd try booting into it with the Dash battery. Once it was done booting into Android, and with the charger connected, I took the battery out.

It stayed on.

Now I was getting somewhere!

I put the original battery back into the Touch Pro 2, put it in Airplane mode (turning off all wireless devices), and now it's charging.

It was kinda funny to see the charging levels during this process. It was at 94% with the Dash battery, then I took out the battery and it stayed there. After putting in the TP2 battery it went down gradually to 54%, and it probably sank lower before rising again. It's now at 71% I'm thinking of maybe turning it off and leaving it connected to the charger to see if it'll start with the loop again. If it doesn't start a loop, then it'll charge faster since it'll be turned off.

Long story short:

When this happens to your Touch Pro 2, it's your battery. I don't recommend fooling with a Dash battery like I did, instead, buy a stand alone battery charger like this one: http://www.amazon.com/Travel-Charge..._1_4?s=wireless&ie=UTF8&qid=1318308064&sr=1-4

Or maybe buy a brand new battery. Don't buy cell phone batteries from Amazon though, try getting it from HTC if you can.

My experience sucked, and I hope this post will be of some use to other people still using this particular phone.