Why my power bank provide fewer charges than expect?

Usually an external battery could supply 60%-70% power to other devices. About 30-40% of the battery capacity is lost in circuit heat and voltage conversions.So a fully charged INIU 20000mAh power bank can offer 12000-14000 mAh to your devices.

How to calculate the possible number of charges?

"Industry-standard formula: (Rated capacity × 65%) ÷ Device battery capacity ≈ Number of Charges. eg. (20,000mAh Powerbank × 0.65) ÷ 3279mAh iPhone14 battery ≈ 4.0 charges"

How long does it take to 100% recharge?

"It depends on the power of the wall charger used 20W charger - 5.4 hrs, 15W fast charger - 6.6 hrs. Note: Please recharge via the USB-C port."

Why doesn’t it charge at max power all the time?

INIU power banks feature a Smart Temperature Monitoring System that adjusts output to prevent overheating. It delivers max power when your device is low, then reduces power to protect your battery and improve efficiency.

Is it allowed on airplanes?

Yes, our 20000mAh power bank meets the regulations of TSA(Transportation Security Administration) for carring board(≤100wh≈27,027mAh).

Iniu Portable Charger Smallest 22 5w 20000mah Usb C In

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Fully operational. Shipping worldwide, on schedule.Duty & taxes paid at delivery

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Description

🔋 Stay charged, stay unstoppable — power that keeps pace with your hustle.

SMART LED DISPLAY - Stay in control with a clear digital battery percentage display—no more guessing when to recharge.
COMPACT YET MIGHTY - Smallest 22.5W 20000mAh power bank that fits effortlessly in your bag or purse—power on the go without the bulk.
POWER UP IN A FLASH - Charge your phone up to 75% in just 30 minutes with cutting-edge PD 3.0 & QC 4.0 tech.
TRIPLE DEVICE CHARGING - Simultaneously juice up three devices with one USB-C and two USB-A ports—share the power, share the vibe.
BUILT TO LAST SUPPORT - Industry-leading 3-year warranty plus lifetime technical support ensures your power bank stays as reliable as you are.

The INIU Portable Charger is a sleek, high-capacity 20000mAh power bank featuring 22.5W fast charging with PD 3.0 and QC 4.0 technologies. It supports USB-C input and output for versatile compatibility with the latest devices, including iPhone 17 series, Samsung S24, and iPads. Its triple-port design allows charging three devices simultaneously, while the LED display provides real-time battery status. Compact and lightweight, it offers a 3-year warranty and lifetime technical support, making it a trusted companion for professionals on the move.

Specifications

ASIN	B0CB1CZWC1
Antenna Location	Camera, MP3 Player, Phone, Tablet
Battery Capacity	20000 Milliamp Hours
Battery Cell Type	Lithium Polymer
Battery Weight	320 Grams
Best Sellers Rank	#4,902 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #275 in Cell Phone Portable Power Banks
Brand	INIU
Built-In Media	1* Power Bank, 1* User Manual, Built in Cables
Color	Black
Compatible Devices	Smartwatch, [Google] Google Pixel 6, Google Pixel 6 Pro, Google Pixel 5,Google Pixel 4A,Google Pixel 3a,Google Pixel 3XL, Google Pixel 3,Google Pixel 2 XL,Google Pixel 2, [Sumsung] Samsung galaxy S23 Ultra / S23 / S23+ /Samsung galaxy S22 Ultra / S22 / S22+ / S21 Ultra /S21+ / S21 / S20 Ultra / S20+ / Z Flip / S10 / S10+ / Note20 / Ultra / Note10 / Note10+ / Note9 / S9 / S9+ / Note 8 / S8 / S8+ / …
Connector Type	USB Type C
Customer Reviews	4.6 out of 5 stars 1,967 Reviews
Is Product Cordless	No
Item Dimensions	5.24 x 1.42 x 5.24 inches
Item Dimensions L x W x Thickness	5.24"L x 1.42"W x 5.24"Th
Manufacturer	Shenzhen Topstar Industry Co.,Ltd.
Mfr Part Number	P51
Model Number	P51
Number of Batteries	1 Lithium Polymer batteries required. (included)
Number of Items	1
Number of Ports	3
Other Special Features of the Product	Digital Display, Fast Charging, Flashlight, Lightweight, Pocket Size
Portable	Yes
Power Source	Corded Electric
Special Feature	Digital Display, Fast Charging, Flashlight, Lightweight, Pocket Size
Voltage	12 Volts
Warranty Description	3 Years
Warranty Type	Limited

Reviews

J**A

12.04.2026

J**Y

18.01.2026

S**F

27.04.2026

J**N

10.04.2026

S**N

26.04.2026

A**A

18.03.2026

C**D

22.02.2026

E**S

19.03.2026

G**.

23.01.2026

O**R

26.11.2025

D**N

26.03.2026

A**Q

21.03.2026

C**E

26.01.2026

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Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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INIU Portable Charger, Smallest 22.5W 20000mAh USB C in & Out Power Bank Fast Charging, PD 3.0+QC 4.0 LED Display Phone Battery Pack Compatible with iPhone 17 16 15 14 Pro Samsung S24 Google iPad etc

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Common Questions