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Anker 335 Power Bank (PowerCore 20K), 20W Portable Charger with USB-C Fast Charging, Works for iPhone 13/12 Series, Samsung, iPad Pro, AirPods, Apple Watch, and More.
- Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
- Learn more about free returns.
- Go to your orders and start the return
- Select the return method
- Ship it!
Learn more
- Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges
- Learn more about free returns.
- Go to your orders and start the return
- Select the return method
- Ship it!
Enhance your purchase
Connector Type | USB Type A |
Brand | Anker |
Battery Capacity | 20000 Milliamp Hours |
Color | black |
Voltage | 5 Volts |
Battery Cell Composition | Lithium Polymer |
Power Source | Corded Electric |
Item Weight | 463 Grams |
Product Dimensions | 6.55"L x 3.26"W x 0.93"Th |
Number of Ports | 3 |
About this item
- Make sure this fits by entering your model number.
- 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.
- Power for 3: Charge your everyday items such as your phone, earphones, and Apple Watch at once.
- Comprehensive Safety System: A combination of 10 safety features that work together to provide ultimate protection for your devices, your chargers and most importantly, you.
- 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.
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Product Description


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Trickle Charging ModeGet optimized charging to low-power devices such as earphones, Bluetooth speakers, and other accessories. |
Wide CompatibilityWorks flawlessly with a wide range of mobile devices including phones, tablets, and more. |
Comprehensive SafetyAnker's MultiProtect safety system combines advanced temperature control, overcharge protection, short-circuit protection, and a fireproof casing to ensure complete protection for you and your devices. |
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Anker 335 Power Bank (PowerCore 20K) | PowerCore Slim 10000 | PowerCore Slim 10000 PD | PowerCore Essential 20000 | PowerCore Essential 20000 PD | PowerCore 26K with 65W USB-C Charger | |
Series | Basic | Basic | Basic | Basic | Basic | Premium |
Main Feature | Slim | Slim | Slim | Portable | Portable | High cell-capacity |
Output Ports | 2xUSB-A 1xUSB-C | 1xUSB-A | 1xUSB-C 1xUSB-A | 2xUSB-A | 1xUSB-C 1xUSB-A | 2xUSB-C 2xUSB-A |
Recharging Time | ~6.5 Hours (with PD charger) | ~5.5Hours | ~4.5Hours (with PD charger) | 10Hours | ~6.8Hours (with PD charger) | ~2.5Hours (with PD charger) |
Size | 6.55 x 3.26 x 0.93 in | 5.91 x 2.68 x 0.57 in | 5.87 x 2.68 x 0.55 in | 6.2 x 2.9 x 0.8 in | 6.22 x 2.93 x 0.76 in | 7.2 x 3.23 x 0.95 in |
Weight | 463g/16.4oz | 208g/7.52oz | 208g/7.52oz | 342.5g/12.1oz | 350g/12.32oz | 748g/26.4oz |
Model: A1288
Anker 335 Power Bank (PowerCore 20K)
One-Stop Charging for Multiple Devices
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.
Superior Safety
Anker’s exclusive MultiProtect safety technology provides complete protection for you and your devices.
Compatibility
Phones:
iPhone 13 / 13 Pro / 13 Pro Max / 13 Mini
iPhone 12 / 12 Pro / 12 Pro Max / 12 Mini
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".
Videos
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My honest review of the Anker Portable Charger
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Craig's Tech Talk
From the brand

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We want you to live without the inconvenience and uncertainty of where your next charge is coming from.
Our chargers and accessories don't just power up your devices, they offer the tech experience you want with zero restrictions.
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Product information
Product Dimensions | 6.55 x 3.26 x 0.93 inches |
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Item Weight | 1.02 pounds |
ASIN | B09SFS9J2K |
Item model number | A1288011 |
Batteries | 1 Lithium Polymer batteries required. (included) |
Customer Reviews |
4.6 out of 5 stars |
Best Sellers Rank | #2,209 in Cell Phones & Accessories (See Top 100 in Cell Phones & Accessories) #137 in Cell Phone Portable Power Banks |
Date First Available | February 14, 2022 |
Manufacturer | Anker |