http://www.amazon.com/Energizer-XP8000-Rechargeable-Power-Netbooks/dp/B0029U2WZU
8000ma battery. Same height as the TouchPro2, about 1/2 inch wider and 1/4 inch thicker. Should be able to fully recharge the phone several times, or be able to leave the wifi router / gps on all day.
You can also run a laptop off it in a pinch.
One thing that is not clear on the packaging is that it does NOT come with it's own charger. It comes with adapters so that you can use your laptop power supply to charge it. So if you don't have a laptop, or access to a laptop power brick, you're sol.