Check out this review.
REVIEW: LG Optimus LTE | Sync? Blog
"I could get through an entire 16
hour day full of email, Twitter, browsing, and phone calls and get home to a battery still above 15%. One strange caveat that I noticed was that the Optimus LTE was very slow to charge through a standard 500mA computer USB port (I can typically charge my Sony Ericsson off my laptop). Plugging it into a regular wall charger (700mA or higher) or a “super”-charge USB port (up to 1,000mA and found on many new desktops) had it fully charged in under 4 hours."
Here's another http://www.youtube.com/watch?v=-v6_RkeHA4Q&hd=1&annotation_id=annotation_665398&fe ature=iv
Looks like a pretty solid phone