Why my power bank provide fewer charges than expect?

Usually an external battery could supply 60%-70% power to other devices. Approximately 30-40% of the battery capacity is lost in circuit heat and voltage conversions.So a fully charged INIU 20000mAh 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 20000mah 22 5w Fast Charging Power

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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¥9253

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power Up Anywhere, Anytime — Don’t Get Left Behind!

FAST CHARGE NO WAIT - 22.5W rapid charging powers your iPhone 16 to 60% or Samsung S25 to 70% in just 25 minutes.
BUILT IN USB C LANYARD - Detachable, ultra-durable nylon cable doubles as a stylish lanyard—ditch extra cords forever.
WORRY FREE 3 YEAR WARRANTY - Join 38M+ users with SafeCharge tech and enjoy hassle-free replacements for 3 years.
MASSIVE POWER MINIMAL BULK - True 20000mAh capacity fits in your pocket for 4 full phone charges without the weight.
TRAVEL READY TSA APPROVED - Compact design passes airport security with ease and includes a handy built-in flashlight for any adventure.

The INIU Portable Charger is a compact, high-density 20000mAh power bank featuring 22.5W fast charging, a built-in USB-C nylon lanyard, and TSA-approved design. It delivers up to 4 full charges for your smartphone, includes a built-in flashlight for emergencies, and offers a 3-year hassle-free warranty, making it the ultimate travel and daily power companion for busy professionals.

Specifications

ASIN	B0FX7T4H7D
Antenna Location	Camera, MP3 Player, Phone, Tablet
Battery Capacity	20000 milliamp_hours
Battery Cell Type	Lithium Polymer
Battery Charge Time	5.4 hours
Battery Weight	320 g
Best Sellers Rank	#155 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #10 in Cell Phone Portable Power Banks
Brand	INIU
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	Output: USB Type C * 2 + USB C *1
Customer Reviews	4.6 4.6 out of 5 stars (28,928)
Global Trade Identification Number	06978018657353
Included Components	1* Power Bank, 1* User Manual, Built in Cables
Item Dimensions	4.1 x 2.8 x 1.2 inches
Item Dimensions L x W x Thickness	4.1"L x 2.8"W x 1.1"Th
Manufacturer	Shenzhen Topstar Industry Co.,Ltd.
Mfr Part Number	P512
Model Name	P512
Model Number	P512
Number of Batteries	1 12V batteries required. (included)
Number of Items	1
Number of Ports	3
Other Special Features of the Product	Digital Display, Fast Charging, Flashlight, Over Charging Protection, Pocket Size
Power Source	Corded Electric
Unit Count	1 Count
Voltage	12 volts_of_alternating_current
Warranty Description	3 Years Warranty

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¥9253

Duties & taxes included

In stock

Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to Japan.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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INIU Portable Charger, Smallest 20000mAh 22.5W Fast Charging Power Bank

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Description

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Common Questions