Texting and Battery Life?

[MrObvious]

Why does it seem like my texting is killing my battery life? I can only get like 4-8 hours from a charge on my phone. I'm running MR 4.6 (need to update profile) and on Alltel. Phone calls and data (EVDO) don't use as much battery so my theory is that it's the SIP using the battery the most.

Any suggestions? Just throw it out there no matter what (even if it's a new battery). The phone is pretty much new.