I live in a 3G area, travel to a bunch of 4G areas, but turn off 4G/LTE most of the time, I can get almost 24 hours out of light usage, 18 hours out of moderate usage and 12-16 hours with medium to heavy usage, defined-
1-2 hour phone,
1-2 hour browse/download,
30 min texting,
1-2 email checking and reading,
Weather updates,
RSS updates, you get the point...
I had the LG Revo, returned it, got the Charge again... MUCH BETTER ON Battery!!! I also got the extended battery, which can give you almost 2 days in 3G and more than enough for 24 hours in 4G. I like the fact that the Charge looks better than the LG Revo and TB does with the extended battery.