Anker

Anker 335 Power Bank

View on Anker Store (EU)View on anker.com

Capacity:: 20,000mAh
Max Output:: 20W Max
Wireless:: None
Weight:: 463 g (16.4 oz)

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Disclaimer: The price and specification of the given product may differ from the actual product. Please confirm on the retailer's website before buying.

Manufacturer: Anker Last updated: 2026-09-15

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Where to buy

Anker Store (EU)Go to store

Anker 335 Power Bank Review

Anker 335 Power Bank (PowerCore 20K) is a 20,000mAh three-device power bank with 1 USB-C and 2 USB-A ports, 20W max charging, and Anker's MultiProtect safety system.

A straightforward, no-frills high-capacity bank that can charge three devices at once, phone, tablet, and earbuds or an Apple Watch. It won't fast-charge anything by modern standards, but the huge capacity and low price make it a reliable backup for long trips.

Design

Dual USB-A plus single USB-C output lets you power three devices simultaneously; trickle-charging mode suits earphones and small accessories.

Charging

20W max output charges an iPhone 13 to 50% in about 37 minutes; charges an iPhone roughly 4 times or a Galaxy S22 Ultra roughly 3 times per full charge.

Our verdict

Reviewed by Burooj Alam. Rated by us, not by users.

Best for

Long trips needing maximum backup capacity
Charging 3 devices at once
Budget-conscious buyers

Not for

Fast PD charging
Laptop charging
Ultralight carry

Specifications

What these specs mean

Identity

Brand	Anker

Capacity

Capacity mAh	20000 mAh

Output power

Single Port Max Output	20 W
Max Output With All Ports	20W Max

Ports

Output Port Count	1 ports
USB-C Port Count	1 ports
AC Outlet	No
Built-in Cable	No

Display and controls

Display Type	No

Size and portability

Weight	463 g
Length	170.0 mm
Width	82.8 mm
Thickness	23.6 mm

FAQs

What are the key specifications of the Anker 335 Power Bank (PowerCore 20K, 20,000mAh, 1x USB-C/2x USB-A, 20W)?

Key specs for the Anker 335 Power Bank: Capacity 20000 mAh, Ports 1x USB-C, 2x USB-A, Max Single-Port Output 20 W, Total Output 20W Max, Laptop Charging 60W+ No, AC Outlet No.

Will the Anker 335 Power Bank (PowerCore 20K, 20,000mAh, 1x USB-C/2x USB-A, 20W) work with my current setup?

The Anker 335 Power Bank (PowerCore 20K, 20,000mAh, 1x USB-C/2x USB-A, 20W) lists Capacity is 20000 mAh. Check that against the hardware you already own before buying, since this is the field that most often decides whether a part fits.

Who is the Anker 335 Power Bank (PowerCore 20K, 20,000mAh, 1x USB-C/2x USB-A, 20W) best suited to?

Best suited to: Long trips needing maximum backup capacity; Charging 3 devices at once; Budget-conscious buyers.

What are the drawbacks of the Anker 335 Power Bank (PowerCore 20K, 20,000mAh, 1x USB-C/2x USB-A, 20W)?

Not the best fit for: Fast PD charging; Laptop charging; Ultralight carry.