Energizer
Side-by-side technical data
Energizer Energy E551S vs Energizer Hard Case P28K
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?
Energizer Hard Case P28K, if you care about…
- Battery Capacity
- 28,000 mAh
- against 2,500 mAh
- RAM Capacity
- 8 GB
- against 1 GB
- Wi-Fi Standards
- Wi-Fi 802.11a/b/g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac)
- against Wi-Fi 802.11 b/g/n
- Display Technology
- IPS LCD
- against TFT LCD
Specification comparison
Battery
| Specification | Energy E551S | Hard Case P28K |
|---|---|---|
| Battery Efficiency Rating | — | — |
| Battery Capacity | 2,500 mAh | 28,000 mAh Best value |
| Battery Type | Li-Ion | — |
| Fast Charge Power | — | 33 W |
| Battery Features | — | Fast Charging |
| Battery Endurance | — | — |
| Wireless charging power | — | — |
| Charge cycles | — | — |
| Talk time | — | — |
| Standby time | — | — |
| Music playback time | — | — |
Design
| Specification | Energy E551S | Hard Case P28K |
|---|---|---|
| Body Colors | Black | Black |
| Body Thickness | — | 27.8 mm |
| Body Width | — | 84 mm |
| Body Height | — | 178.1 mm |
| Weight | — | 570 g |
| Usable Surface | — | 73 % |
| Body Materials | — | — |
| Resistance Features | — | IP68, IP69 |
| Waterproof Depth | — | 1.2 m |
| Drop Resistance Class | — | — |
| Repairability Class | — | — |
| Foldable | No | No |
| Rugged Build | No | No |
| Drop Test Count | — | — |
| Unfolded thickness | — | — |
| QWERTY keyboard | — | — |
Performance
| Specification | Energy E551S | Hard Case P28K |
|---|---|---|
| Processor Model | MediaTek MT6737M | MediaTek Helio G99 |
| Processor Process Size | 28 nm | 6 nm Best value |
| Graphics GPU | ARM Mali-T720 MP2 | Mali-G57 MC2 |
| Storage Type | eMMC 5.0 | — |
| Maximum CPU Clock | 1.3 GHz | 2.2 GHz Best value |
| Maximum Storage Capacity | 8 GB | 256 GB Best value |
| AnTuTu Score | — | — |
| Geekbench 6 Single-Core | — | — |
| Geekbench 6 Multi-Core | — | — |
| CPU Description | Quad-core 1.3 GHz Cortex-A53 | Octa-core CPU with 2x2.2 GHz Cortex-A76 and 6x2.0 GHz Cortex-A55 |
| Processor Type | Quad-Core | Octa-Core |
| 64-Bit Processor | — | — |
| RAM Capacity | 1 GB | 8 GB Best value |
| RAM Type | — | — |
| Expandable Storage | Yes | Yes |
| AnTuTu version | — | — |
| 3DMark Wild Life Extreme | — | — |
| Maximum memory card | — | — |
Sensors
| Specification | Energy E551S | Hard Case P28K |
|---|---|---|
| Fingerprint Sensor Placement | — | — |
Display
| Specification | Energy E551S | Hard Case P28K |
|---|---|---|
| Display Aspect Ratio | 16:9 | 20.5:9 |
| Peak Display Brightness | — | — |
| Display Technology | TFT LCD | IPS LCD Best value |
| Display Diagonal | 5.5″ | 6.78″ Best value |
| Display Horizontal Resolution | 480 px | 1,080 px Best value |
| Display Vertical Resolution | 854 px | 2,460 px Best value |
| Display Pixel Density | 178 ppi | 396 ppi Best value |
| Display Refresh Rate | — | — |
| Touch Sampling Rate | — | — |
| Display Contrast Ratio | — | — |
| Display Features | — | IPS LCD |
| 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 | — | — |
Sensor
| Specification | Energy E551S | Hard Case P28K |
|---|---|---|
| Sensor Features | Accelerometer | Accelerometer, Gyroscope, Proximity Sensor, Compass |
Software
| Specification | Energy E551S | Hard Case P28K |
|---|---|---|
| Operating System | Android 8 | Android 14 |
| OS Family | Android | Android |
| OS Version | 8 | 14 Best value |
| OS Update Support | — | — |
| Direct OS Updates | — | — |
| Google Services | — | — |
| Web browser | — | — |
| Java (J2ME) | — | — |
Connectivity
| Specification | Energy E551S | Hard Case P28K |
|---|---|---|
| SIM Configurations | Nano-SIM + Micro-SIM | Dual Nano-SIM |
| Cellular Bands | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS B900, 3G UMTS 2100, 4G LTE B1, 4G LTE B3, 4G LTE B7, 4G LTE B8, 4G LTE B20, LTE B28 | 2G GSM 850, 2G GSM 900, 2G GSM 1800, 2G GSM 1900, 3G UMTS B850, 3G UMTS B900, 3G UMTS 1700 AWS, 3G UMTS 1900, 3G UMTS 2100, 4G LTE B1, 4G LTE B2, 4G LTE B3, 4G LTE B4, 4G LTE B5, 4G LTE B7, 4G LTE B8, 4G LTE B12, 4G LTE B13, 4G LTE B17, 4G LTE B18, 4G LTE B19, 4G LTE B20, 4G LTE B25, 4G LTE B26, LTE B28, 4G LTE B38, 4G LTE B40, 4G LTE B41, 4G LTE B66 |
| Cellular Technologies | GSM, HSPA, LTE | GSM, HSPA, LTE |
| Wi-Fi Standards | Wi-Fi 802.11 b/g/n | Wi-Fi 802.11a/b/g, Wi-Fi 4 (802.11n), Wi-Fi 5 (802.11ac) Best value |
| Wi-Fi Features | Wi-Fi 802.11 b/g/n | Dual Band |
| Bluetooth Version | Bluetooth 4.0 | Bluetooth 5.2 Best value |
| Bluetooth Profiles | A2DP, LE | A2DP, LE |
| Navigation Systems | GPS | GPS, Galileo, GLONASS, BeiDou Best value |
| Connectivity Features | 3.5 mm Audio Jack, FM Radio, microUSB | NFC, USB Type-C |
| USB Version | microUSB | USB 2.0 |
| SAR American Head | — | — |
| SAR American Body | — | — |
| SAR (EU) head | — | — |
| SAR (EU) body | — | — |
| Messaging | — | — |
Audio
| Specification | Energy E551S | Hard Case P28K |
|---|---|---|
| Microphone Count | — | — |
| Audio Features | A2DP, LE, Loudspeaker | A2DP, LE, Loudspeaker |
| Alert types | — | — |
Technical
| Specification | Energy E551S | Hard Case P28K |
|---|---|---|
| EAN / GTIN | — | — |
| UPC | — | — |
| Launch price | — | — |
| MPN | — | — |
| Launch price (USD) | — | — |
Features
| Specification | Energy E551S | Hard Case P28K |
|---|---|---|
| Built-in functions | — | — |
