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

The Anker Nano Power Bank A1638 is a compact 10,000mAh portable charger with a built-in retractable USB-C cable and a claimed 45W maximum single-port output. Its three-port listing and reduced output when multiple ports are used make it better suited to charging a phone than sustaining laptop power.

- [Original product page](https://bargainpostbox.co.uk/product/anker-nano-power-bank-a1638-10000mah-45w)
- [View offer](https://bargainpostbox.co.uk/visit/anker-nano-power-bank-a1638-10000mah-45w)
- Market: UK
- Language: en-GB
- Currency: GBP
- Brand: Anker
- Model: A1638
- Category: Electronics > Electronics Accessories > Power Banks
- Price: 39.99 GBP
- Previous price: 49.99 GBP
- Discount: 20%
- Price checked: 2026-11-12T17:43:31.987Z
- Rating: 4.5 / 5
- Reviews: 3820

Prices and deal status are the latest recorded data, not a guarantee of availability. Confirm the price and availability with the store.

## At a glance

- Built-in retractable USB-C cable reduces the need to pack a separate charging lead for compatible devices.
- The claimed 45W maximum applies to single-port use. Listing details state output falls to 15W maximum with two ports, or 7.5W per port with three.
- A smart display and pass-through charging are claimed in the listing features.
- The listing says a 30W or higher Power Delivery adapter is recommended for optimal recharging.

## Pros

- Integrated retractable cable makes quick phone top-ups simpler when you do not want to carry a separate USB-C lead.
- Compact listed dimensions and a display make it practical for pocket or travel use, according to customer feedback and listing details.
- The claimed 45W single-port output supports faster charging for compatible phones, though actual rates depend on the device.

## Cons

- The 10,000mAh capacity is a phone-top-up format rather than a good fit for sustained laptop charging. The listing itself does not recommend it for routine laptop use.
- Output is substantially limited when charging through multiple ports, so it cannot maintain the single-port maximum across several connected devices.
- The claimed battery capacity is not all available as device-side power. The listing estimates 5,500mAh to 6,500mAh usable after conversion losses.

## Specifications

### Identity
- Brand: Anker
- Model: A1638
- Colour: Blue
- Compatible device: Smartphone
### Power and battery
- Capacity: 10000 Milliamp Hours
- Maximum output wattage: 45 Watts
- Voltage: 5 Volts
- Amperage: 3 Amps
- Power configuration: Corded Electric
- Battery cell type: Lithium Polymer
- Battery charge time: 2 Hours
- Battery weight: 144 Grams
### Connections and features
- Connector type: USB Type C
- Number of ports: 3
- Built-in cable: Built In Cable
- Portable: Yes
- Cordless: No
### Dimensions and installation
- Dimensions listed: 8.2 x 3.6 x 5.1 centimetres
- Weight listed: 231 Grams

## Before you buy

- The listing claims the power bank can recharge in 2 hours and elsewhere specifies a 30W maximum input. It recommends a 30W or higher PD adapter for optimal recharging.
- To charge iPhone 14 series and earlier, the listing says a USB-C to Lightning cable is needed and is not included.
- The listing estimates 5,500mAh to 6,500mAh of usable power from its stated 10,000mAh capacity because of conversion losses.
- A connected phone may draw less than the 45W maximum, depending on its accepted charging rate and temperature.
- Listing details are inconsistent about the dimensions and weight: the details table gives 8.2 x 3.6 x 5.1 centimetres and 231 Grams, while feature text gives 81.5 x 50.5 x 36.1 mm and 232 g. The claimed 45W maximum also contrasts with a feature statement that the USB-C port and included cable support 40W fast charging for named phones. Confirm which figures and output apply to the selected version. The listing says 45W is a single-port maximum, multiple-port use reduces output, and laptop charging is not recommended for sustained use.

## A good fit for

- Phone owners who want a pocketable backup battery with an attached USB-C cable for compatible devices.
- Travellers who prioritise a built-in cable and quick single-device charging over charging several devices at high speed.
- Buyers who want a screen showing charging information and can accept the listed weight and capacity trade-offs.

## Less suited to

- People seeking a power bank for sustained laptop charging or substantial laptop use.
- Anyone who needs high output while charging two or three devices at once.
- Buyers who need a guaranteed specific charging speed across all phone models or a stated usable capacity equal to 10,000mAh.

## Customer feedback

Customer feedback highlights the built-in display, compact size, portability and retractable cable as useful for on-the-go phone charging. Some customers describe the weight as light, while others find it heavier than expected. That trade-off matters for a pocketable 10,000mAh bank listed at about 231–232 g. The reported positive charging experiences do not establish a particular speed or number of device charges, which depend on the phone and usage.
- Positive themes: Customers report appreciating the display, compact size, portability and retractable cable.
- Mixed feedback: Feedback on weight is mixed, with some finding it light and others heavier than expected.

## Frequently asked questions

### Does the Anker Nano A1638 provide 45W charging?
The listing claims up to 45W from a single port. It also says output is limited to 15W maximum when two ports are used and 7.5W per port with three. A feature statement separately names 40W fast charging for certain phones, so check the applicable output for your device and version.
### Can it charge a laptop?
The listing says laptop charging is not recommended for regular use because the 10,000mAh capacity and heat during high-power output do not sustain 45W for long. It describes emergency top-ups as the more suitable use.
### Is a charging cable included?
A retractable USB-C cable is claimed as built in. The listing says a separate USB-C to Lightning cable is required for iPhone 14 series and earlier, and that cable is not included.
### How much of the 10,000mAh capacity can be used?
The listing estimates about 5,500mAh to 6,500mAh of usable power after battery and circuit conversion losses. Actual charging results vary with the connected device.

## Alternative options

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## Add-ons

- [Khanka Hard Case for Anker Nano Power Bank,10,000mAh 45W\(A1638\) \| Storage Travel Cover for Anker Nano 45W Max Compact Battery Pack;EVA shell,Velvet Interior,Green,Case Only](https://bargainpostbox.co.uk/visit/anker-nano-power-bank-a1638-10000mah-45w)

## Images

![Anker Nano Power Bank A1638, 10,000mAh, 45W — 1](https://bargainpostbox.co.uk/i/askw9kQd0Tp62buTa_rtp6KNwuLR8Lr2wA1frkcZdD60bGZfxSYujRwE8BqJjt96FPphXfryszMoSs--2b6KlOWg706Grwhku8J8I5vu5ZBAf1zVFwGn4jjy.jpg)

![Anker Nano Power Bank A1638, 10,000mAh, 45W — 2](https://bargainpostbox.co.uk/i/0UCAPH6tcCTDP8VU1Yxfw5fH3Fi9dSeTK3nPlANKWqLmABdY8gE6UxXBrQOQUbnnVB5JdYKquNBIAWx5nlTGGCjoAakrc2kjVnvhEAwzA7KUf3-Lrg5LVY2G.jpg)

![Anker Nano Power Bank A1638, 10,000mAh, 45W — 3](https://bargainpostbox.co.uk/i/DLxakKL774162N-a6Nc0WgK4vAfRK5wlF_cSLymTePnCamiDKb8OptHqFUPXKUg-ZGcPohUClVDG5yOp4PdK7hb2dlmgU2KvjswOVdWKXNvl0OHlSvbIhrsP.jpg)

![Anker Nano Power Bank A1638, 10,000mAh, 45W — 4](https://bargainpostbox.co.uk/i/q8paVek0HMGV17qf99e6tI1l8QkYCSScJeyMI-L-OV6_ivajC0R2gJl0FRh8K5tesJKRjah6axb-pXPefKXP32dkQZXE7DEYB_53fzNxn9_1yAFe7UCa00N9.jpg)

![Anker Nano Power Bank A1638, 10,000mAh, 45W — 5](https://bargainpostbox.co.uk/i/mJWV_aQj-MyW9Ijs-EqTH0TZM-avrax8hV9o5CmPupwLb4D_v6UozR4mgYNe5Linkp7vfIh8GMZa6YSg6vqitrdVMmFVJPVk29ZSRq3AERZavaT1KczwTSJp.jpg)

![Anker Nano Power Bank A1638, 10,000mAh, 45W — 6](https://bargainpostbox.co.uk/i/ZBNW65amKTVdO1tlf2WP3C1O-r-1vZWq0JFoU1valpycK7_aeeKeUC8D4E8Wqoe2w-QJNsAJtaTBXfTBjSkPhQE0SzhLyjULOOn-jsfxdb7iIXeoUNUdXA80.jpg)

![Anker Nano Power Bank A1638, 10,000mAh, 45W — 7](https://bargainpostbox.co.uk/i/2u7-WkYIbGp-Qzvg0ugi_Q4lV8zq3DZvy2C3EuiDNVBk3Z4k_ejT8RBcVzZTb8oyDrBLQ3ZlvmJkokk3qn35lp6bIjcTB0I-uaNyuiVEj4HjiVj-j9kdhy_T.jpg)