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 (Pink)

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 (Pink)

Product ID: 628792075

Details

Battery Capacity
10000 Milliamp
Brand
Anker
Color
Pink
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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2502525₫

Duties & taxes included

In stock

Sold byAmazon VietnamDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Details

Battery Capacity
10000 Milliamp
Brand
Anker
Color
Pink

Description

⚡ Power up your hustle, anywhere, anytime!

COMPACT CHIC - Sleek pink design fits effortlessly in your bag at just 8.82 oz and pocket-friendly dimensions—style meets ultimate portability.
DUAL DEVICE DYNAMO - Charge two devices simultaneously with dual ports—perfect for managing your iPhone and wireless earbuds without missing a beat.
POWER THAT KEEPS UP - 10,000mAh capacity fuels your iPhone 15 Pro nearly twice on a single charge—never run low on juice during your busiest days.
LIGHTNING FAST BOOST - 30W max output charges your iPhone from 0 to 50% in just 25 minutes—because waiting is so last decade.
ALL IN ONE CONVENIENCE - Integrated USB-C cable plus foldable wall plug means no more tangled cords or forgotten adapters—travel light, charge smart.

The Anker Nano 3-in-1 Portable iPhone Charger is a 10,000mAh lithium polymer power bank designed for iPhone 15/16/17 series users. It features a built-in USB-C cable, foldable wall plug, and supports 30W two-way fast charging, enabling rapid device and power bank recharge. Compact and lightweight, it can charge an iPhone 15 Pro nearly twice and supports simultaneous charging of two devices, making it an essential travel companion for professionals on the go.

Specifications

ASIN	B0CXDTNJST
Antenna Location	Indoor/Outdoor
Battery Capacity	10000 Milliamp Hours
Battery Cell Type	Lithium Polymer
Battery Weight	144 Grams
Best Sellers Rank	#399 in Cell Phones & Accessories ( See Top 100 in Cell Phones & Accessories ) #32 in Cell Phone Portable Power Banks
Brand	Anker
Color	Pink
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 Ports	2
Other Special Features of the Product	Fast Charging
Portable	No
Power Source	Battery
Reusability	Rechargeable
Special Feature	Fast Charging
UPC	194644067489
Unit Count	1.0 Count
Voltage	5 Volts
Warranty Description	18
Warranty Type	Limited

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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