Anker Zolo A1689 Power Bank, 20,000mAh, 30W

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Product guide

Anker Zolo A1689 Power Bank, 20,000mAh, 30W

Anker Zolo A1689 is a 20,000mAh portable power bank with a built-in USB-C cable and claimed 30W output. Its generous stated capacity suits extended days away from a socket, but customer feedback also flags the weight and size as trade-offs for carrying it around.

At a glance

The listing claims 20,000mAh capacity, 30W output and 20W input for recharging the power bank.
A 5.98-inch built-in USB-C cable is intended to reduce the need to carry a separate charging lead.
The listing describes ActiveShield 2.0 temperature monitoring and CB-certified battery cells.
A low-current mode for small electronics and pass-through charging are described in the listing.

Price

£26.99Save 23%

Reference price: ~~£34.99~~

Price checked: 12 Nov 2026

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Pros and cons

Pros

The stated 20,000mAh capacity is suited to carrying several phone recharges between mains charging opportunities.
The integrated USB-C cable and listed USB Type A and USB Type C connectors offer more than one way to connect devices.
The listing says the power bank can recharge in about 2.5 hours when used with a 20W fast charger.

Cons

At 365 grams according to the listing, it adds noticeable weight to a small everyday bag.
Customer feedback describes it as bulky or heavier than expected, which may matter for pocket or one-handed carry.

Technical specifications

19 specifications

Identity
Brand	Anker
Model	A1689

Power and battery
Battery capacity	20000 Milliamp Hours
Power configuration	Corded Electric
Battery cell type	Lithium Polymer
Voltage	20 Volts
Amperage	3 Amps
Battery charge time	2.5 Hours
Rechargeability	Rechargeable
Battery weight	264 Grams

Charging and connections
Connectors	USB Type A, USB Type C
Number of ports	2
Built-in cable	Built In Cable

Dimensions and installation
Dimensions listed	12 x 7.3 x 3.1 centimetres
Weight listed	365 Grams

Other details
Colour	Black
Compatible device	Smartphone
Compatible phone model	iPhone
Warranty	18-month

What to know before buying

Listing details to confirm

The title and feature claims specify 30W output, while the specifications list 20 Volts and 3 Amps without clearly stating their relationship to the headline charging rate. The listing also gives different dimension orders and descriptions, and its 'Corded Electric' and 'Is Product Cordless: No' fields are inconsistent with a portable power bank. Treat charging and size details as listing claims and confirm the selected product configuration if these affect your purchase. The claimed 2.5-hour recharge depends on using a 20W fast charger.

Who is it for?

A good fit for

Travellers and people spending long days away from mains power who prioritise stated capacity over minimal carry weight.
Phone users who want an integrated USB-C cable and both USB-A and USB-C connector options.

Less suited to

Buyers prioritising a lightweight, pocketable power bank.
Anyone needing verified charging output for a particular phone or device. The listing does not clearly reconcile its headline 30W claim with the listed voltage and current.

Anker Zolo A1689 Power Bank, 20,000mAh, 30W · photo 2 — Additional product photo 2

Customer reviews on Amazon

4.5 / 5 · 15,178 ratings

5 stars78%78%
4 stars11%11%
3 stars3%3%
2 stars1%1%
1 star7%7%

Customer feedback reports that the power bank can provide multiple phone charges and is useful for travel, with some describing it as portable enough for a camera bag. The built-in cable and stated 20,000mAh capacity fit that use, though customer feedback also calls it bulky and heavy, and opinions on its size differ. The listing's claimed capacity should not be read as a guaranteed number of full charges for every phone.

Positive themes

Customers describe it as useful for travel and report getting multiple phone charges.
Some customers say it fits in a camera bag, while others praise its usefulness on a camping trip.

Negative themes

Customer feedback describes the power bank as heavy to carry in one hand.

Mixed feedback

Customers differ on its size. Some find it compact enough for a camera bag, while others say it is larger than expected.

Frequently asked questions

Does the Anker Zolo A1689 include a charging cable?

The listing describes a built-in USB-C cable measuring 5.98 inches, so a separate USB-C cable may not be needed for compatible devices.

How quickly can the power bank be recharged?

The listing claims approximately 2.5 hours with a 20W fast charger. Recharge time depends on using a charger and cable that meet the power bank's requirements.

Can it charge smaller devices such as earphones?

The listing says it has a low-current mode for small electronic devices. It describes entering and exiting the mode by double-tapping the power button.

Can it charge a device while being recharged itself?

The listing claims pass-through charging, allowing the power bank to recharge while supplying power to a connected device.