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).

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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

Product ID: 619265536

Details

Battery Capacity
20000 Milliamp
Brand
INIU
Color
Black
Connector Type
USB Type C
Special Feature
Digital Fast

⚡22.5W ultra-fast charging

🔋20000mAh high-capacity battery

🔌USB-C input & output + 2 USB ports

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€ 62.12

Duties & taxes included

In stock

Sold byAmazon CroatiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🔋 Stay powered, stay ahead — the ultimate fast-charge companion for the on-the-go pro.

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.
TRUSTED BY MILLIONS - Join over 38 million users enjoying safe, reliable charging backed by a 3-year warranty and lifetime support.
TRIPLE DEVICE CHARGING - Simultaneously power up to three devices with one USB-C and two USB-A ports—never leave anyone behind.
FUTURE PROOF USB C IN OUT - 2024-ready USB-C ports for seamless compatibility with the latest iPhones, iPads, and Android devices.
MASSIVE JUICE MINIMAL BULK - 20000mAh capacity packed into the smallest, sleekest design—power that fits in your pocket.

The INIU Portable Charger is a compact powerhouse featuring a 20000mAh lithium polymer battery and 22.5W fast charging with PD 3.0 and QC 4.0 technologies. It supports USB-C input and output alongside two USB-A ports, enabling simultaneous charging of three devices. Designed for the latest smartphones and tablets, it offers rapid charging speeds—up to 75% phone charge in 30 minutes—and comes with a digital LED display, a 3-year warranty, and lifetime technical support, making it the go-to power bank for busy professionals who demand speed, reliability, and style.

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	#5,923 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #326 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 4.6 out of 5 stars (2,117)
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
Voltage	12 Volts
Warranty Description	3 Years
Warranty Type	Limited

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