BenQ-Siemens
Side-by-side technical data
BenQ-Siemens EF51 vs BenQ-Siemens E81
Compare up to four phones using typed, normalized technical data. Measurements stay numeric, capabilities stay boolean, and options stay comparable.
The verdict
Neither runs away with it: each wins something.
Which one is for you?
BenQ-Siemens EF51, if you care about…
- Maximum Storage Capacity
- 20 MB
- against 16 MB
- Usable Surface
- 35.7 %
- against 21.9 %
- Display Diagonal
- 2.2″
- against 1.8″
BenQ-Siemens E81, if you care about…
- Battery Capacity
- 900 mAh
- against 870 mAh
- Display Pixel Density
- 157 ppi
- against 80 ppi
- Weight
- 90 g
- against 95 g
- Body Thickness
- 16.7 mm
- against 18 mm
Specification comparison
Battery
| Specification | EF51 | E81 |
|---|---|---|
| Battery Efficiency Rating | — | — |
| Battery Capacity | 870 mAh | 900 mAh Best value |
| Battery Type | Li-Ion | Li-Ion |
| Fast Charge Power | — | — |
| Battery Features | — | — |
| Battery Endurance | — | — |
| Wireless charging power | — | — |
| Charge cycles | — | — |
| Talk time | 4 h | 5 h Best value |
| Standby time | 200 h | 300 h Best value |
| Music playback time | — | — |
Design
| Specification | EF51 | E81 |
|---|---|---|
| Body Colors | White, Black | Black |
| Body Thickness | 18 mm | 16.7 mm Best value |
| Body Width | 49 mm | 46.7 mm |
| Body Height | 89 mm | 99.8 mm |
| Weight | 95 g | 90 g Best value |
| Usable Surface | 35.7 % Best value | 21.9 % |
| Body Materials | — | — |
| Resistance Features | — | — |
| Waterproof Depth | — | — |
| Drop Resistance Class | — | — |
| Repairability Class | — | — |
| Foldable | No | No |
| Rugged Build | No | No |
| Drop Test Count | — | — |
| Unfolded thickness | — | — |
| QWERTY keyboard | — | — |
Performance
| Specification | EF51 | E81 |
|---|---|---|
| Processor Model | — | — |
| Processor Process Size | — | — |
| Graphics GPU | — | — |
| Storage Type | — | — |
| Maximum CPU Clock | — | — |
| Maximum Storage Capacity | 20 MB Best value | 16 MB |
| AnTuTu Score | — | — |
| Geekbench 6 Single-Core | — | — |
| Geekbench 6 Multi-Core | — | — |
| CPU Description | — | — |
| Processor Type | — | — |
| 64-Bit Processor | — | — |
| RAM Capacity | — | 16 MB |
| RAM Type | — | — |
| Expandable Storage | Yes | Yes |
| AnTuTu version | — | — |
| 3DMark Wild Life Extreme | — | — |
| Maximum memory card | — | — |
Sensors
| Specification | EF51 | E81 |
|---|---|---|
| Fingerprint Sensor Placement | — | — |
Display
| Specification | EF51 | E81 |
|---|---|---|
| Display Aspect Ratio | 15:16 | 4:5 |
| Peak Display Brightness | — | — |
| Display Technology | TFT LCD | TFT LCD |
| Display Diagonal | 2.2″ Best value | 1.8″ |
| Display Horizontal Resolution | 120 px | 176 px Best value |
| Display Vertical Resolution | 128 px | 220 px Best value |
| Display Pixel Density | 80 ppi | 157 ppi Best value |
| Display Refresh Rate | — | — |
| Touch Sampling Rate | — | — |
| Display Contrast Ratio | — | — |
| Display Features | — | — |
| Integrated Projector | No | No |
| Projector Brightness | — | — |
| Projector Horizontal Resolution | — | — |
| Projector Vertical Resolution | — | — |
| Cover display diagonal | — | — |
| Cover display refresh rate | — | — |
| Cover display peak brightness | — | — |
| Display colors | 256K colors | 256K colors |
Sensor
| Specification | EF51 | E81 |
|---|---|---|
| Sensor Features | — | — |
Software
| Specification | EF51 | E81 |
|---|---|---|
| Operating System | — | — |
| OS Family | — | — |
| OS Version | — | — |
| OS Update Support | — | — |
| Direct OS Updates | — | — |
| Google Services | — | — |
| Web browser | WAP 2.0/xHTML | WAP 2.0/xHTML |
| Java (J2ME) | Yes | Yes |
Connectivity
| Specification | EF51 | E81 |
|---|---|---|
| SIM Configurations | Mini-SIM | Mini-SIM |
| Cellular Bands | 2G GSM 900, 2G GSM 1800, 2G GSM 1900 | 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS 2100 |
| Cellular Technologies | GSM, GPRS | GSM, UMTS, 3G Best value |
| Wi-Fi Standards | — | — |
| Wi-Fi Features | — | — |
| Bluetooth Version | Bluetooth 1.2 | — |
| Bluetooth Profiles | A2DP | — |
| Navigation Systems | — | — |
| Connectivity Features | MP3 Player, FM Radio, USB Charging | MP3 Player, USB 2.0 |
| USB Version | Proprietary | USB 2.0 |
| SAR American Head | — | — |
| SAR American Body | — | — |
| SAR (EU) head | — | — |
| SAR (EU) body | — | — |
| Messaging | SMS, MMS | SMS, MMS, Email |
Audio
| Specification | EF51 | E81 |
|---|---|---|
| Microphone Count | — | — |
| Audio Features | A2DP, 3D Surround Sound | — |
| Alert types | Vibration, Polyphonic ringtones, MP3 ringtones, Downloadable ringtones | Vibration, Downloadable ringtones, Polyphonic ringtones, MP3 ringtones |
Technical
| Specification | EF51 | E81 |
|---|---|---|
| EAN / GTIN | — | — |
| UPC | — | — |
| Launch price | — | — |
| MPN | — | — |
| Launch price (USD) | — | — |
Features
| Specification | EF51 | E81 |
|---|---|---|
| Built-in functions | Predictive text input, Voice memo, Stopwatch, Organizer, MP3 player | MP3 player, Predictive text input, Organizer |
