IPhone battery life is going to suck, any objections?

I bought an LG VX8700 from Verizon just yesterday and on a full charge, the battery can last only a day with EVDO enabled (and with barely any talktime used). The iPhone is going to have all the perks of my phone and it will have WiFi access. Needless to say, the battery isn't going to last a long time. I thought the iPhone was a cool concept, but just pointless since you can get a better voice phone, a better MP3 player, a better camera for the price you pay for an iPhone.