Battery life for both phones is satisfactory. Samsung claims 769 minutes of talk time in the 2G version or 391 minutes for 3G, with a standby of 750 hours (2G) or 625 hours (3G). After a day of fairly constant use (Internet browsing, phone calls, maps, games, YouTube videos, etc.), both phones were in serious need of a recharge. However, such multitasking didn't eat battery power with the same hunger of previous Android phones.
It's why you purchased a phone in the first place, no? Previous users of Android devices will be familiar with the Galaxy S's calling interface. Call fidelity was generally crystal-clear, although some callers complained that my voice seemed distant whenever I held the device to my ear rather than using the headset-no surprise. Holding the smartphones in either my left or right hand caused no loss of reception. No death grip here.
The Samsung Galaxy S comes equipped with a 5.0-megapixel camera. That's a solidly middle-of-the-road number of megapixels, and shooting both photographs and camcorder footage is an equally solid middle-of-the-road experience. For the most part, images were crisp, although the cameras in both the Vibrant and the Captivate seemed better suited for outdoor work; interior shooting, particularly in environments where the light source came from a fluorescent bulb, occasionally resulted in somewhat soft-focus images.
However, the camera offers lots of granular options (Exposure Value, Night Mode, Portrait Mode, Shooting Mode, etc.) that could satisfy the more serious shutter-bugs. The camcorder (which shoots 30 frames per second, at 1,280x720 resolution) had more trouble shooting in low-light conditions than did the still camera, which came off as more capable of displaying details even in nighttime shots.