My friend just got the thunderbolt, he says he loves it, sexy hardware, snappy performance, 4g, everything is good, except the battery life. He told me that he MUST turn off all apps when not in use, anything that is constantly updating, refreshing in the background needs to be turned off. He needs to also turn off wifi and 4g to save battery life as well. He says he wishes the extended battery shipped with the thunderbolt. Basically he only turns apps and functions on when he needs them and turns them off immediately after, his favorite and most often used app is the battery manager.