Battery Life
One of the notable strengths of the Bird S663 is its battery life, a hallmark of older phones. It is equipped with a removable Li-Ion 700 mAh battery, offering up to 140 hours of standby time and up to 3 hours of talk time. This longevity is particularly useful for those who value a reliable device that doesn’t require constant charging—a stark contrast to the battery demands of contemporary smartphones.