Really put this baby to the test last night and once again, it came up aces. Got to the Mets game around 5:00 - at 100 percent, no battery mod. Turned off WiFi and Bluetooth, as usual. Took some pics and videos, texted, surfed the web a bit. After eating, sat down and watched the rest of the LSU-Wisconsin game (nice cheap-*** clothesline LSU) with my son on the ESPN app, for about an hour or so. Texted, took pics and videos during the Mets-Nats game, used MLB At-Bat app to check in on other games of importance to Mets' Wild Card chances (Cards, Pirates). Game ended around 10:30, they had fireworks following game, so I took a few fireworks pictures before heading to car for the ride home, around 11:00. The Z Force was at 83 percent after all that. Yes, 83 percent. I'm starting to think I wasted my money on the battery mod, since I haven't even used it yet.