Forcing 1x over EVDO

[mulhiny]

I'm wondering if the phone might get a little better battery life if it didn't have to switch from EVDO to 1x everytime I make/receive a call or send a text and then switch back to EVDO when I'm done. The only way I know to force my phone to 1x is to force it to roam. Is there another way? Am I crazy for thinking this might save a little battery? I've searched for an answer but having a hard time since the search engine won't let me look for "1x" due to the 3 letter thing.