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| Specification | Value |
|---|---|
|
Brand
|
Sigma |
|
Model
|
M4 |
|
Capacity
|
β‘ 20000 mAh |
|
Power Output
|
22.5W PD |
|
Battery Type
|
Grade-A Lithium Polymer |
|
Certification
|
β CE & RoHS |
|
Built-in Cables
|
β Type-C & Lightning |
|
Input
|
2Γ Type-C |
|
Output
|
3Γ (2Γ Type-C, Lightning) |
|
LED Display
|
β Yes |
|
PD Indicator
|
β Purple Light |
|
Travel Ready
|
β Yes |
|
Color
|
Grey |
The ultimate week-long fast charging power bank forsmartphones. The Sigma M4 delivers 20000mAh Grade-Apower with built-in Type-C and Lightning cables, 22.5WPD speed, and ultra-compact Super Mini design β no extracables needed, just grab and charge anywhere for days.
The M4 is the ultimate fast charging power bank for smartphones with week-long capacity. Both Type-C and Lightning cables are built directly into the body. iPhone? Pull the Lightning cable. Android? Pull the Type-C cable. No extra cables. No tangles. Complete convenience.
The Sigma M4 uses only Grade-A Lithium Polymer cells with CE & RoHS international safety certifications β ensuring zero risk, zero swelling, and maximum battery health for 20000mAh of reliable daily power.
Four Reasons This Is The Best Fast Charging Power Bank for Smartphones
No extra cables needed β both Type-C and Lightning are built right into the power bank. iPhone users and Android users both covered. Grab and charge instantly. Zero tangles. Zero forgetting cables.
Power Delivery fast charging at 22.5W charges your smartphones significantly faster than standard power banks β less waiting, more doing. The perfect fast charging power bank for smartphones.
Clear LED display shows exact remaining battery percentage. Purple PD indicator confirms fast charging is active. Always informed. Always in control.
Ultra-compact Super Mini design fits in any pocket β yet delivers 20000mAh of Grade-A certified power. The most portable complete charging solution available.
What is the difference between Sigma M3 and M4?
The Sigma M3 offers 10000mAh for 2+ phone charges while the M4 offers 20000mAh for 4+ phone charges. Both feature identical 22.5W PD fast charging, built-in Type-C and Lightning cables, LED display, and CE/RoHS certification. Choose M3 for daily light use and M4 for week-long heavy use and travel.
Is the M4 a good fast charging power bank for smartphones?
Yes. The Sigma M4 is one of the best fast charging power banks for smartphones because it combines 20000mAh week-long capacity with built-in Type-C and Lightning cables β covering both iPhone and Android without any extra cables. The 22.5W PD fast charging ensures maximum speed for all compatible smartphones.
Can I charge iPhone and Android at the same time with M4?
Yes. The M4 has 3 output ports β 2Γ Type-C and 1Γ Lightning. You can charge an iPhone using the built-in Lightning cable and an Android phone using the built-in Type-C cable simultaneously β making it perfect for households with mixed devices.
Is the M4 safe for my expensive smartphone?
Absolutely. The M4 is CE and RoHS certified β meeting strict international safety standards. It uses a Grade-A Lithium Polymer battery which prevents swelling, overheating, and degradation. Multi-layer protection including overload, overcharge, and short-circuit protection safeguards your smartphone completely.
Fast charging power for smartphones
No extra cables needed
International safety guaranteed
Ultra-compact pocket-friendly design


