Battery Life
For users who prioritize battery longevity, the Philips 639 offers reliable performance with its removable Li-Ion 600 mAh battery. It provides a standby time of up to 400 hours and a talk time of around 4 hours, which is commendable for a device from its era. The removable nature of the battery is another feature that has diminished in prevalence with modern smartphones, offering both nostalgia and practicality for some users today.