Why is my power bank providing fewer charges than expected?

The capacity reduction during charging is due to a 30% to 45% energy loss in the battery cells and conversion circuitry. Therefore, a fully charged Anker Nano Power Bank offers an estimated 5500mAh to 7000mAh to power devices.

How can I estimate the number of charges for my device?

To estimate charges, use this formula: (Power Bank Capacity × 0.7) ÷ Device Battery Capacity. For example, an iPhone 15 with a 3,877mAh battery can receive about 1.92 charges from a 10000mAh power bank (calculated as (10000mAh × 0.7) ÷ 3,877mAh).

How can I charge an iPhone 13 Pro Max with this power bank?

To charge iPhones prior to the iPhone 15 series, an additional USB-C to Lightning cable is required.

Is it normal for the power bank to get slightly warm during use?

Slight heating due to efficiency losses in the conversion circuit is normal. The temperature of this Anker Power Bank meets the temperature limits of the IEC62368 certification standard.

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Nano 3-in-1 Portable iPhone Charger, 10,000mAh Power Bank with Built-in USB-C Cable and Foldable Wall Plug, 30W Max Battery Pack, Travel Essentials for iPhone 17/16/15 Series (Blue)

Nano 3-in-1 Portable iPhone Charger, 10,000mAh Power Bank with Built-in USB-C Cable and Foldable Wall Plug, 30W Max Battery Pack, Travel Essentials for iPhone 17/16/15 Series (Blue)

Product ID: 631296151

Details

Battery Capacity
10000 Milliamp
Brand
Anker
Color
Blue
Connector Type
C Cable*1
Special Feature
Fast Charging

⚡30W two-way fast charge

🔋10,000mAh powerhouse

🔌Built-in USB-C & foldable plug

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2503947₫

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In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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

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Details

Battery Capacity
10000 Milliamp
Brand
Anker
Color
Blue

Description

⚡ Power up your hustle with the ultimate 3-in-1 travel charger!

DUAL DEVICE CHARGING - Keep your essential devices powered simultaneously—because multitasking never looked this good.
ALL IN ONE POWERHOUSE - Seamlessly combines power bank, charger, and cable for ultimate convenience on the go.
COMPACT TRAVEL READY - Sleek 4.25x2x1.22 inch design weighing under 9 oz fits perfectly in your professional carry-on.
SMART DURABLE DESIGN - Integrated USB-C cable and foldable wall plug eliminate cable clutter and ensure lasting reliability.
LIGHTNING FAST 30 W OUTPUT - Charge your iPhone 15 Pro from 0 to 50% in just 25 minutes—stay ahead, always.

The Anker Nano 3-in-1 Portable iPhone Charger is a sleek, 10,000mAh power bank featuring a built-in USB-C cable and foldable wall plug. Delivering up to 30W two-way fast charging, it powers iPhone 15/16/17 series devices rapidly and supports simultaneous charging of two devices. Compact and lightweight, it’s designed for busy professionals who demand reliable, on-the-go power without the bulk or cable chaos.

Specifications

ASIN	B0CX4GPH2D
Antenna Location	Indoor/Outdoor
Battery Capacity	10000 Milliamp Hours
Battery Cell Type	Lithium Polymer
Battery Weight	144 Grams
Best Sellers Rank	#398 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #32 in Cell Phone Portable Power Banks
Brand	Anker
Color	Blue
Compatible Devices	Smartphone
Connector Type	USB-C1+Built-in C Cable1
Customer Reviews	4.6 out of 5 stars 2,748 Reviews
Is Electric	No
Item Dimensions	4.25 x 1.22 x 1.97 inches
Item Dimensions L x W x Thickness	4.25"L x 1.22"W x 1.97"Th
Item Weight	8.82 Ounces
Manufacturer	Anker Innovations Limited
Mfr Part Number	A1637
Model Number	A1637
Number of Batteries	1 Lithium Ion batteries required.
Number of Items	1
Number of Outlets	2
Number of Ports	2
Other Special Features of the Product	Fast Charging
Portable	No
Power Source	Battery
Reusability	Rechargeable
Special Feature	Fast Charging
UPC	194644067472
Unit Count	1.0 Count
Voltage	5 Volts
Warranty Description	18

Reviews

A**O

2.05.2026

F**R

24.02.2026

A**N

8.11.2025

M**Z

4.02.2026

M**Y

12.04.2026

G**A

21.11.2025

S**R

2.04.2026

M**Y

28.04.2026

F**T

7.09.2025

S**O

3.01.2026

S**S

25.01.2025

Ó**R

13.03.2026

R**Y

5.03.2026

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2503947₫

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

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