Product guide

Anker Nano Power Bank A1638, 10,000mAh, 45W

Anker Nano Power Bank A1638 is a 10,000mAh portable charger with a claimed 45W maximum single-port output and a built-in retractable USB-C cable. Its compact listed dimensions suit pocket carry, while the capacity and output are better suited to phone top-ups than sustained laptop charging.

At a glance

Built-in retractable USB-C cable is intended to reduce the need to carry a separate charging lead.
A smart display is listed, and customer feedback describes it as showing useful charging information.
The manufacturer states a 30W maximum input and recommends a 30W-or-higher PD adapter for optimal recharging.
Output is stated to fall to 15W maximum with two ports in use, and 7.5W per port with three.

Price

£37.99Save 24%

Reference price: ~~£49.99~~

Price checked: 12 Nov 2026

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Often bought together

Khanka Hard Case for Anker Nano Power Bank,10,000mAh 45W(A1638) | Compatible with Anker Nano Power Bank,10,000mAh 45W(A1638) Powerbank;Hard Case for Storage,White,Case Only

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Pros and cons

Pros

10,000mAh capacity and a built-in cable make it a compact option for everyday phone charging.
The stated 45W single-port maximum offers fast charging for compatible devices, subject to the device's own limits.
Customer feedback appreciates the display, compact size and retractable cable.

Cons

The manufacturer says the power bank is not recommended for laptop charging because it cannot sustain 45W for long.
Using multiple ports reduces the stated output substantially compared with single-port use.
The manufacturer estimates 5,500mAh to 6,500mAh of usable power after conversion losses, below the headline cell capacity.

Technical specifications

17 specifications

Identity
Brand	Anker
Model	A1638

Power and battery
Capacity	10000 Milliamp Hours
Maximum output	45 Watts
Power configuration	Corded Electric
Cell type	Lithium Polymer
Recharge time	2 Hours
Voltage	5 Volts
Amperage	3 Amps

Connections and features
Connector	USB Type C
Number of ports	3
Fast charging	Fast Charging

Dimensions and installation
Dimensions listed	8.2 x 3.6 x 5.1 centimetres
Weight listed	231 Grams

Other details
Compatible device	Smartphone
Colour	White
Warranty listed	18-month

What to know before buying

Listing details to confirm

Listing details are inconsistent or unconfirmed: the title and feature copy describe a portable 10,000mAh power bank with 45W output and a retractable cable, while the technical fields say it is not portable or cordless, identify Corded Electric power, list 5 Volts and 3 Amps, and give 2 Hours recharge time. Dimensions and weight also differ slightly between the feature copy and technical fields. The product description states a 24-month warranty, while a technical field lists 18-month. Confirm the selected listing's specifications and warranty before purchase. The claimed 45W is a maximum single-port output, not a guaranteed rate for every device. The manufacturer says some phones accept less and charging may slow as a device heats. The iPhone 14 series and earlier require a USB-C-to-Lightning cable, which is stated to be not included.

Who is it for?

A good fit for

Phone users wanting a compact power bank with an integrated retractable USB-C cable.
Travellers who prioritise pocketable backup charging and a display with charging information.
Owners of compatible phones who can make use of fast single-port USB-C charging.

Less suited to

Buyers needing sustained laptop charging or high capacity for extended use.
Anyone who regularly charges several devices at once and expects full single-port charging speed on each.

Customer reviews on Amazon

4.5 / 5 · 3,820 ratings

5 stars79%79%
4 stars11%11%
3 stars3%3%
2 stars2%2%
1 star5%5%

Customer feedback highlights the compact size, pocket-friendly portability, useful display and handy retractable cable. Some customers describe the power bank as light, while others find it heavier than expected. These impressions are relevant for everyday carry, but the listed weight is 231 Grams, and the reported experience does not establish how quickly a particular phone will charge or how many charges an individual will get.

Positive themes

Customers appreciate its compact size and portability.
The built-in display and retractable cable are described positively.

Mixed feedback

Weight perceptions differ, with some customers finding it light and others heavier than expected.

Frequently asked questions

Does the Anker Nano Power Bank provide 45W to every device?

No. The listing gives 45W as the maximum single-port output. The manufacturer notes that the connected device may accept less, and charging can slow as it heats.

Can it charge a laptop?

The manufacturer does not recommend it for laptop charging. It says the power bank cannot sustain 45W for long because of its limited capacity and heat buildup.

What happens when more than one port is used?

The manufacturer states a maximum of 15W when two ports are used and 7.5W per port with three ports in use.

Is a cable included for older iPhones?

The built-in cable is USB-C. The listing says iPhone 14 series and earlier need a USB-C-to-Lightning cable, which is not included.