You can get a battery for the Sprint Touch Diamond from Expansys. Someone from Sprintusers did and it worked. I couldn't find a link to just the battery but I did find a link to the door + a battery. I wonder if that door will fit our sprint diamonds.
This one (battery + diamond facet shaped door):
http://www.expansys-usa.com/p.aspx?i=166204
or this one (battery + plain grey door):
http://www.expansys-usa.com/p.aspx?i=173907
or this one (no pic of the battery though):
http://www.ordercellphone.com/utstar...50-333668.html
If you call Expansys they may sell the battery by itself without a cover for less. Who will try and get the diamond facet cover to fit the sprint?
Also the GSM Diamond Chargers should work with the CDMA batteries. I modified a $5 Treo 800w charger from Ebay to charge my extra GSM Battery and the original OEM battery. The GSM and OEM Batteries charge fine in the same charger.
Note: Although the 900mAh battery does fit nicely in the Sprint Diamond, the battery meter cannot read how much charge is on the batter. Just shows an empty battery with the exclamation point on it. It does power the device fine. You just don't know when it will die.
This type of charger should work for the Sprint battery also:
http://cgi.ebay.com/2x-Battery-Desktop-Charger-for-HTC-Touch-Diamond-P3700_W0QQitemZ360093999970QQcmdZViewItem?hash=ite m360093999970&_trkparms=72%3A1163|39%3A1|66%3A2|65 %3A12|240%3A1318&_trksid=p3286.c0.m14