ah. Navigation is what has been my biggest user of batteries, but now that I've got a vehicle with built in nav I don't use the phone much for that. I'll use the phone for nav when driving one of our other vehicles, but for vacation, we will be using the newer car. i haven't found picture taking to be a drag on the battery, given how few pics I take but I could see where a frequent snapper might need more juice. I was so afraid such a large screen would KILL the battery, but somehow Samsung managed to give us a phone with both a large screen and good battery life. go figure! Way better than my POS BB and better than my POS Bionic with extended battery. life is good!