I notice with 7720 my battery is dropping fast I suspect it may have to do with 7720 not having whatever "tailoring" that happens per carrier but that is speculation. Might just be some XDA shenanigans as it relates to WP7. But running RTM, I could go all day and into the next before needing to charge but I'm afraid to leave the house. For sure, I'll drop back to RTM and compare notes. Anyone else having battery issues because of this?