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

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Product guide

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

The Anker Nano Power Bank A1638 is a 10,000mAh portable charger rated for up to 45W single-port output. Its built-in retractable USB-C cable and display suit phone top-ups on the move, while the listing says its limited capacity and heat make it unsuitable for sustained laptop charging.

At a glance

A built-in retractable USB-C cable is designed to reduce cable clutter when charging on the go.
The listing describes a smart display, pass-through charging and a maximum 45W output from one port.
Output is reduced when charging multiple devices: the listing states up to 15W total with two ports and up to 7.5W per port with three.
The listing says usable energy is about 5,500mAh to 6,500mAh after conversion losses, rather than the full rated cell capacity.

Price

£37.99Save 24%

Reference price: ~~£49.99~~

Price checked: 12 Nov 2026

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Often bought together

Anker Nano Smart Display Charger, 45W GaN USB C Fast Charger, Type C Plug | New iPhone Recognition and AVS Support via OTA Update, Care Mode Extends Battery Life, for iPhone Duo/18 pro max/17/16 Series

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Anker USB C to USB C Charger Cable, 60W (3A) New Nylon (6 ft/1.8m, 2-Pack) | For iPhone 18/17/16/15 , iPad Pro, Samsung Galaxy, MacBook Pro,and More (Black)

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Pros and cons

Pros

The integrated retractable cable means a separate charging cable may not be needed for a USB-C device.
The smart display is reported by customers as useful for seeing charging information.
Customers highlight the compact size and portability for pocket carry and travel.

Cons

The manufacturer says the 10,000mAh bank cannot sustain 45W output for long and does not recommend it for routine laptop charging.
Using two or three ports reduces available output substantially compared with single-port operation.

Technical specifications

15 specifications

Identity
Brand	Anker
Model	A1638

Power and battery
Power configuration	Corded Electric
Capacity	10000 Milliamp Hours
Maximum output	45 Watts
Input voltage	5 Volts
Amperage	3 Amps
Battery type	Lithium Polymer
Battery charge time	2 Hours
Ports listed	3

Connections and features
Connector type	USB Type C
Special feature	Fast Charging
Compatible devices	Smartphone

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

What to know before buying

The 45W figure is a maximum single-port claim, not a guaranteed charging rate. The listing says phone acceptance, device temperature and multi-port use can reduce output. Its included cable is said to support 40W for the named phone series.
The listing states a 30W maximum input and says a full recharge takes 2 hours. That time is a manufacturer claim and depends on the charging setup.

Listing details to confirm

The listing is inconsistent on weight and dimensions: it gives 231 Grams and 8.2 x 3.6 x 5.1 centimetres in product details, but the feature text says 232 g and 81.5 x 50.5 x 36.1 mm. It also conflicts on warranty duration, stating 18-month in details and 24-month in the package claim. Check the selected listing for the applicable figures and coverage.

Who is it for?

A good fit for

Phone users wanting a portable 10,000mAh bank with an integrated USB-C cable and display.
Travellers seeking a pocketable charger for device top-ups, accepting the listed weight and capacity trade-offs.
People charging one compatible device at a time who can benefit from the stated maximum output.

Less suited to

People seeking a power bank for sustained laptop charging or high-capacity multi-device use.
Buyers who need full-speed charging across several devices at once.

Anker Nano Power Bank A1638, 10,000mAh, 45W · photo 2 — Additional product photo 2

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 built-in display, compact carry, travel convenience and handy retractable cable. Some customers describe it as light, while others find it heavier than expected, so its listed weight may matter for pocket carry. These reports fit a phone-top-up power bank, but do not establish its actual output or usable capacity. The overall ratings are mostly five-star, with a smaller spread across lower star categories, and do not explain the reasons for individual ratings.

Positive themes

Customers describe the display as informative and the retractable cable as handy.
Customer feedback praises its compact size and portability for travel.

Mixed feedback

Reports about weight differ: some customers find it light, while others consider it heavier than expected.

Frequently asked questions

Can it charge a laptop?

The listing does not recommend it for routine laptop charging. It says the limited capacity and heat buildup mean it cannot sustain 45W for long, so it is better suited to phone top-ups.

Does it provide 45W when charging multiple devices?

No. The listing describes 45W as the maximum single-port output. It states that output falls to a maximum of 15W when using two ports and 7.5W per port when using three.

How much power is usable from its 10,000mAh capacity?

The listing estimates about 5,500mAh to 6,500mAh of usable power after battery and circuit conversion losses.

How long does recharging take?

The manufacturer claims a 2-hour recharge and separately states a maximum 30W input. Actual time depends on the charging setup.