The Anker 20,000mAh Portable Charger with USB-C cable, sold by Anker as the Anker Power Bank (20,000mAh, 22.5W, Built-In USB-C Cable), model A1647, is a large-capacity power bank that carries its own cable. Because the cable is built into the body, you can charge a phone without packing a separate lead.

In addition, a USB-C port and a USB-A port let you charge a second device. With 20,000mAh, it holds roughly twice the energy of a common 10,000mAh power bank. As a result, it suits long days out, weekend trips and shared use by two people.

Anker 20,000mAh Portable Charger with built-in USB-C cable, front view

22.5W output from the Anker 20,000mAh Portable Charger

The built-in cable, the USB-C port and the USB-A port each deliver up to 22.5W. Anker lists output profiles of 5V/3A, 9V/2A and 10V/2.25A. However, the total output is 15W when you charge several devices at once. Therefore, each device charges more slowly than it would alone.

Moreover, the power bank is designed for phones, earbuds, smartwatches and tablets. Laptops usually need 45W or more, so they are a poor match. For recharging, Anker lists a maximum input of 20W. Consequently, a 20W or stronger USB-C charger gives the fastest refill.

Built-in USB-C cable and phone stand

The integrated USB-C cable is always with the power bank and ready to plug in. In addition, Anker describes an integrated phone stand, so you can prop up your phone while it charges. However, the cable is fixed. Therefore, keep a spare cable for devices with a different connector, such as a Lightning iPhone.

USB-C and USB-A ports on the Anker 20,000mAh power bank with built-in cable

Size and weight

The body measures 113 × 72 × 30.5 mm (4.5 × 2.8 × 1.2 in) and weighs 315 g (11.11 oz). Although it is a little heavier than a 10,000mAh model, it still fits a bag or a large jacket pocket.

Who should buy the Anker 20,000mAh Portable Charger?

The Anker 20,000mAh Portable Charger suits people who want several phone charges from one battery and prefer not to carry a cable. For example, typical buyers include:

• Commuters and students who charge a phone every day
• Travelers and festival-goers who are away from a socket for long periods
• Two people who want to share one battery

However, if you need to charge a laptop at full speed, look at a higher-output model instead. For instance, compare the Anker Power Bank (20K, 87W, Built-In USB-C Cable), model A1383, on Discompare.

FAQ: Anker 20,000mAh Portable Charger With USB-C Cable (22.5W, Built-In USB-C Cable)

Model: A1647. Draft for the FAQPage schema block. Prices are intentionally excluded; use live merchant feed prices. Answers marked “verify” must be confirmed before publishing. Estimates are labeled as estimates.

Matching warning: Anker also sells a different power bank with the same capacity and a built-in cable, the Anker Power Bank (20K, 87W, Built-In USB-C Cable), model A1383. It has more power, three ports and a different price. Do not merge the two listings. Always match on model number A1647.

The Basics

Q1. What is the Anker 20,000mAh Portable Charger With USB-C Cable?

It is a 20,000mAh power bank from Anker with a USB-C cable built into the body, so you do not need to carry a separate cable for most phones. It also has one USB-C port and one USB-A port. Anker’s formal name is “Anker Power Bank (20,000mAh, 22.5W, Built-In USB-C Cable)” and the model number is A1647.

Q2. Why does this product have several different names?

Retailers list the same A1647 hardware as “Anker 20,000mAh Portable Charger, 22.5W High-Speed Charging Power Bank with Built-in USB-C Cable, 1 USB-C, 1 USB-A” and “Anker Power Bank (20,000mAh, 22.5W, Built-In USB-C Cable)”. Use the model number A1647 to confirm you are comparing the same product.

Q3. How is it different from the Anker 20K 87W power bank (A1383)?

Both have 20,000mAh and a built-in USB-C cable. The A1383 is a higher-output model (87W max, three ports) aimed at laptops. The A1647 is a 22.5W model designed for phones, tablets and small accessories. Compare them as separate products on Discompare.

Q4. Who is it for?

It suits commuters, students and travelers who mainly charge phones, earbuds, smartwatches or tablets, and who want to leave the cable at home. If you need to charge a laptop at full speed, compare higher-output models such as the A1383 (87W) or the Anker Prime series.

Q5. What is in the box?

Newegg lists the power bank and a welcome guide. Anker’s pages checked do not list the box contents. Verify with the specific listing before publishing, and do not assume a separate charging cable or wall adapter is included.

Q6. What colors does it come in?

Anker advertises five colors but its pages checked do not name them. Newegg lists a White version. Verify the current color options before publishing, and treat each color as a variant of the same A1647 listing.

Q7. How big and heavy is it?

It measures 113 × 72 × 30.5 mm (4.5 × 2.8 × 1.2 in) and weighs 315 g (11.11 oz) according to Anker’s US page and Newegg. Anker’s service page shows 100 g, which looks like an error for this capacity. Use 315 g and verify with Anker.

Power and Charging Speed

Q8. How much power does the Anker 20,000mAh Portable Charger deliver?

Each output (the built-in USB-C cable, the USB-C port and the USB-A port) delivers up to 22.5W. Output profiles listed by Anker are 5V/3A, 9V/2A and 10V/2.25A.

Q9. What happens when I use more than one output at once?

Anker and Newegg state that the total output across the outputs is 15W. Two devices charging together will therefore each get less than the 22.5W single-port maximum.

Q10. Which fast-charging standards does it support?

Anker’s pages checked list the output voltages but do not name the protocols. The 5V/9V/10V profiles point to 22.5W fast-charging modes rather than USB Power Delivery. Verify the supported protocols (for example PD, QC, PPS) before publishing compatibility claims.

Q11. Can it charge a laptop?

Not at full speed. A 22.5W output is enough for tablets and, at best, a slow top-up for very light USB-C laptops. Most laptops need 45W to 100W. If you need laptop charging, look at the A1383 (87W) or another higher-output model.

Q12. Can it charge an iPhone quickly?

Yes, in practice. iPhone models with USB-C or Lightning can charge from this bank, but the speed is set by the phone. A USB-C iPhone can draw up to about 20W to 27W under ideal conditions with a suitable cable, so the 22.5W limit is close to the phone’s maximum. The built-in cable is USB-C. For Lightning iPhones, use a USB-C to Lightning cable in the USB-C port, or a Lightning cable in the USB-A port.

Q13. Does it charge Samsung phones at full speed?

Speed depends on the phone model and on the protocols supported (see Q10). Many Samsung Galaxy phones charge at 15W to 25W or more. Verify against your phone’s maximum rate.

Q14. Does it charge AirPods, a smartwatch or a fitness tracker?

Yes, through the USB-C or USB-A port with the device’s own cable. Very low-power devices may need low-current mode. Verify if your accessory stops charging early.

Q15. Can I charge a Nintendo Switch, Steam Deck or tablet?

A tablet will charge well. Handheld consoles that draw more than 22.5W will charge slowly or not at all during play. This is an estimate rather than an Anker-published compatibility claim.

Built-In Cable, Ports and Design

Q16. What ports does it have?

Three outputs: one built-in USB-C cable, one USB-C port and one USB-A port. The USB-C port can be used for output and, per Anker’s spec, for charging the bank itself.

Q17. How long is the built-in cable?

Anker’s pages checked do not state the cable length. Verify the length before publishing.

Q18. Can I replace the built-in cable if it breaks?

The cable is integrated into the body and is not designed to be replaced. The USB-C and USB-A ports keep working if the cable fails. Verify the warranty terms for cable damage.

Q19. Does it have a phone stand?

Anker describes an integrated phone stand so you can charge and watch or use the phone at the same time. Newegg also lists a built-in carry strap. Verify both features on the specific listing.

Q20. Does it have a display?

Anker’s pages checked do not mention a display. Verify the indicator type (LED lights or none) before publishing.

Capacity and Battery Life

Q21. Is it really 20,000mAh?

The rating is 20,000mAh. Every power bank loses energy when it converts voltage and delivers power, so the usable capacity is lower. Anker’s pages checked do not state a usable figure. As an estimate, expect about 60% to 70% of the rating in real use.

Q22. How many times can it charge my phone?

As an estimate, an iPhone with a battery of about 3,300mAh could get roughly 3 to 4 charges, and a 5,000mAh Android phone about 2 charges. Results depend on the phone, cable and use. These are estimates, not Anker figures.

Q23. How many watt-hours is it?

Anker’s pages checked do not give a Wh figure. As an estimate, 20,000mAh at a typical 3.7V cell voltage is about 74Wh. Verify with the label on the product. This is under the common 100Wh airline limit.

Q24. Does the battery lose capacity over time?

All lithium batteries age. Anker’s pages checked do not publish a charge-cycle rating. Verify before promising a figure.

Recharging

Q25. How do I recharge it?

Connect a USB-C cable to the power bank and a charger, or use the built-in cable if Anker’s guide allows it. Anker lists a maximum input of 20W, with 5V/3A, 9V/2.22A and 12V/1.67A profiles.

Q26. How long does it take to recharge?

Anker’s pages checked do not state the recharge time. As an estimate, a full recharge from empty with a 20W charger takes roughly 5 to 6 hours. Verify with Anker.

Q27. Can I charge devices while it recharges?

Anker’s pages checked do not say. Verify before publishing whether pass-through charging is supported.

Safety and Travel

Q28. Can I bring it on a plane?

Power banks must go in carry-on baggage, not checked luggage. At an estimated 74Wh it should be below the 100Wh limit common on airlines. Airlines have extra rules on how many power banks you may carry and whether you can use them in flight, so check your airline’s policy. Anker’s pages checked do not state a flight-approval claim.

Q29. Is it safe to use?

Anker’s pages checked do not detail the safety system. Verify before publishing. As with any lithium battery, do not use a damaged pack, keep it dry, and stop using it if it swells, smells or overheats.

Q30. Is it water resistant?

No IP rating is listed. Treat it as not waterproof.

Warranty

Q31. What is the warranty?

Newegg lists an 18-month manufacturer warranty with a 30-day refund and a 90-day replacement. Anker’s pages checked do not state the term. Third-party retailers may offer their own terms. Verify with your seller.

Buying and Comparing

Q32. Is it good value?

That depends on the current price. Use Discompare’s live price comparison and price history to see whether a deal is real. Prices are excluded here on purpose.

Q33. Is it still available?

Newegg showed the listing as out of stock and possibly not restocked at the time of research. Check current merchant availability on Discompare.

Q34. How is it different from a 10,000mAh power bank?

It holds about twice the energy, so it gives roughly twice as many phone charges. It is also bigger and heavier (315 g). Choose 20,000mAh for multi-day trips or several devices, and 10,000mAh for daily carry.

Q35. Where can I compare prices?

Discompare lists live prices from verified merchants for A1647, so you can see the current lowest price and the price history.