As a PDA, the PPC4100 was a performance-chart topper. Running on the PPC4100's Intel XScale 400MHz processor, programs responded quickly, even with other applications operating in the background. But more impressive is the phone's battery life. In our CNET Labs battery-drain tests, where we repeatedly played a video clip with the backlight set at high, the PPC4100 lasted an astonishing 9.2 hours. Since our tests are designed to zap power as fast as possible, you'll get more mileage from your device with normal use. We managed to beat the rated talk time of 3 hours by an hour, and standby time is rated at 100 hours.
We had no trouble with the PPC4100's IrDA and GSM/GPRS capabilities. Web pages loaded at a respectable-if-not-lightning-fast pace. We also managed to sync our e-mail and contacts with our PC using the included cradle, but we were still disappointed by the absence of Bluetooth or Wi-Fi. According to the FCC, the PPC4100 has a digital SAR rating of 1.32 watts per kilogram.