after researching android battery life relentlessly, i finally found a solution that SUBSTANTIALLY increased my battery life. as you can see, i am new to this site, and a new android user - so if this solution has already been discussed, i apologize in advance.
anyway, i found the solution here:
For Those With Battery Draining Issues - xda-developers
as the link states, there is a service that automatically boots at startup called "omadrmconfigservice" that supposedly checks for media hub theft more than 4 times per minute - even when your phone is "asleep" (no clue how juice defender impacts this, as i know it turns radios off while the phone is "asleep").
i found the above information pretty quickly - but finding an appropriate solution took some more searching/experimentation. you can go into settings > applications > running devices and tap the process to stop it, but it will restart every time you reboot your infuse, thereby forcing you to form a ritual every time you turn your phone on (which i am not fond of). the OP and several commenters suggest renaming/deleting several files, but all posts seem to be kind of vague at best, and also contradictory, about exactly how to keep the service from automatically booting on startup.
i'm not sure if the commenters were trying to say this, but i will say it much more succinctly. the way to stop the "omadrmconfigservice" process from automatically booting at startup is as follows:
1. have a rooted device
2. download/open titanium backup
3. go tot the "backup/restore" tab
4. find the file named "DRM content 2.2.1" and tap it
5. tap "freeze!"
6. find the file named "DRM content launcher 1.0" and tap it
7. tap "freeze!"
freezing these two files in titanium backup did the trick for me. no need to delete or rename anything, and if i should ever need the service to run again, i simply unfreeze the files in titanium (some people in the xda thread reported problems with stock media/video player and gallery - but it seemed like they deleted/renamed, instead of freezing - i have experienced NO such problems). i should mention that i had frozen the actual media hub bloatware application before i discovered that the "omadrmconfigservice" service was running all the time - i am not sure if it is necessary, but you might as well freeze the bloatware application too, since it seems as though no one really uses media hub.
immediately after freezing these 2 files and confirming that the "omadrmconfigservice" service was no longer automatically booting at startup (checked both before and after several reboots), i can confidently report that my battery life is SIGNIFICANTLY better without this service running all of the time. it would simply be too big of a coincidence for something else to have been putting such a heavy strain on my battery.
even if you are getting quality battery life already (i was getting between 12-16 hours with moderate use, 8-10 with heavy use - which i consider pretty good), this should help your battery life greatly. now that "omadrmconfigservice" doesn't run anymore, i seriously cannot kill this device no matter how hard i try.
hopefully this is helpful (and not repetitive) and can improve your samsung infuse experience! it definitely has improved mine!