Price: $35.99
(as of Mar 17, 2026 16:45:27 UTC – Details)

Product description

Trickle Charging Mode

Get optimized charging to low-power devices such as earphones, Bluetooth speakers, and other accessories.

Wide Compatibility

Works flawlessly with a wide range of mobile devices including phones, tablets, and more.

Add to Cart

Add to Cart

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Main Feature
Slim Built-In C Cable*2 Built-In C Cable Slim Built-In C Cable*2 PD 3.1, Max 140W

Output Ports
2xUSB-A 1xUSB-C Built-in C Cable + 1C1A Built-in C Cable + 1C USB-C*1+USB-A*2 Built-in C Cable*2 + 1C1A 2 USB-C+1 USB-A

Recharging Time
~6.5 Hours (with PD charger） ～3.8Hours(30W) ~2.5 Hours(20w) ~8 Hours(15w) ~2 Hours(100W) ~1 Hour (140W)

Size
6.55 x 3.26 x 0.93 in 4.72*2.89*1.24in 4.32*2.58*0.98 in 6.22 x 2.93 x 0.76 in 6.18 * 1.93 * 2.12 in 6.13 * 2.15 *1.95 in

Weight
1.07lb 0.9lb 0.47lb 0.77lb 1.31lb 1.31lb

Model: A1288

Anker 335 Power Bank (PowerCore 20K)

size: 6.57″L x 3.28″W x 0.96″Th

weight: 1.07 Pounds

Super Huge Capacity

Conveniently power all your essential devices wherever you go thanks to the 20,000mAh battery capacity. Charge an iPhone 13 over 4 times or a Galaxy S22 Ultra more than 3 times.

Charge 3 Devices At Once

Charge your phone, tablet, and earbuds or Apple Watch simultaneously from one power bank.

Designed for Speed

20W fast charging lets you charge an iPhone 13 to 50% in 37 minutes.

Compatibility

Phones:

iPhone 15 / 15 Pro / 15 Pro Max

iPhone 14 / 14 Pro / 14 Pro Max

Samsung S21

Samsung S22

Google Pixel 5 / 6

Tablet:

iPad 9th Gen

Wireless Earbuds:

AirPods Pro / 3 (with wireless charging case)

Apple Watch:

Apple Watch Series 5 and 7

Notes:

USB-C to Lightning cable not included.Apple Watch cable not included.Not compatible with MacBook Pro 13″ (2019) and MacBook Pro 16″.Do not use the power bank in humid environments to prevent oxidation of the USB ports.If the power bank is not functioning properly, clean the USB ports with alcohol swabs to reduce contact issues caused by debris or oxidation.

Power You Can Bank On: Equipped with 20,000mAh capacity, keep your devices powered for days while you travel for work or leisure. Charge an iPhone 13 4.3 times, or a Galaxy S22 Ultra over 3 times.
Blazing Fast Speeds: Get the fastest possible charge of up to 20W with 3 USB ports. Charge an iPhone 13 to 50% in 37 minutes. (Note: For iPhone 14 series and earlier, please use a USB-C to Lightning adapter (not included).
Portable Power for 3: With a compact design measuring 6.57 × 3.28 × 0.96″ and weighing just 1.07 lb, it can power your phone, earbuds, and Apple Watch all at once.
What You Get: Anker 335 Power Bank (PowerCore 20K), USB-A to USB-C cable, welcome guide, our 18-month stress-free warranty, and friendly customer service.