Battery Life
Powered by a removable Li-Ion 920 mAh battery, the S81 delivers respectable longevity for its era, with up to 320 hours of standby time and approximately 4 hours and 50 minutes of talk time. Such battery performance, combined with the phone's power-efficient features and limited multitasking, meant users could generally enjoy a full day of use without needing a recharge.
In summary, the BenQ-Siemens S81 reflects a different era in mobile technology, where the emphasis was on basic functionality and connectivity rather than the advanced capabilities we now take for granted. While it lacks many features of modern smartphones, its design, connectivity, and fundamental multimedia offerings provided a robust mobile experience for users during its time on the market. This phone serves as a nostalgic reminder of the incredible pace at which mobile technology has evolved since the mid-2000s.