Here's what I was able to dig up.
http://www.verizonwireless.com/b2c/s...hetypeId=11545
I cannot stand verizon's website, Needlessly complex and yet lacking useful information. i see no reason why this would not work with Sprint, but no promises. Sorry.
Description:
Have an extra battery available for your HTC Touch Pro2 if your charger is not available. This battery is a 2100 mAh Lithium Ion. Battery times vary based upon personal use and system transition.
Extended battery is packaged with an extended battery door.
(PART# VZW6875BATX)