Unlike my older PDA, I have only had issues of exhausting my battery on the TX one time. Oddly enough, that was because I left the PDA in my car overnight and the temperature dropped close to freezing. The next morning the battery was dead, but because of the flash memory, I lost nothing . A rather strange situation indeed.
I have only occasionally dropped below ~30% capacity (I'm almost always within the 50-100% fully charged). Since this display is so clear and sharp, I set my backlight pretty low which seems to work in all but brightly lighted outdoor conditions.
I also find that I only use the charger that comes with the cradle for travel since the the TX "trickle charges" from the USB connection on the cradle. About an hour on the base is usually enough to restore a full charge and even with my PC in sleep mode, the USB port is still alive and charging the battery.
So far I have lost no sleep over missing this (once necessary) app. I think you will be pleased with the battery performance as well.
Cheers,
John