If you want a phone with a good battery life, go for LG Invision.
It has a lightweight, short and wide design that's quite peculiar. Measuring about 4.05 x 2.08 x 0.47 inches, it is one of the slimmest phones ever made. It's colored black, except for the chrome edging. For its display, it has 65,000-color support with 320x240 pixel resolution. It measures 2.2 inches, and shows great graphics and images. Its features include a 500 contact list, 10 polyphonic MP3 ringtones, vibrate mode, text and multimedia messaging, built-in speakerphone, a calculator, a tip calculator, a calendar, a notepad, a stopwatch, an alarm clock, a world clock, a countdown timer, a unit converter, a task list, voice command, instant messaging, stereo Bluetooth, mobile Web email, and a wireless Web browser.
Other than these, it has a 3G support, 1.3 megapixel camera, and camcorder. Though it only has a hundred and eighty minute talk time, it has excellent call quality.