i had the same phone since its release and it is ALWAYS on, unless i went somewhere for an extended period of time and forgot my charger. but the battery clip just vanished the other day and i just got my voyager. i was playing on it all day (listening to music, playing games, and finding pictures to download, and on the internet) and i went to bed with half a battery left. thats amazing battery life. i thought that i would be turning it on all the time in my pocket but it dosent turn on at all which is a plus.
I have a Treo 755, and I hate the Internet on it. I don't even attempt to surf LT on that phone. I'm looking to get an iPhone, and so far I've been impressed with the internet and Battery life. Battery life is about the only thing I like about my Treo, as I pull it off the charger at work at 6PM, go home, have it sit all night, use it as an alarm clock, make 50 or so calls per day on it, text, and I only recharge it once every two days.