Anker 737 vs Anker 20K is a choice between laptop-class output and everyday portability. For most people, the Anker Power Bank (20K, 87W), model A1383, is the better all-around buy: it has a built-in USB-C cable, 20,000mAh capacity, and enough output for phones, tablets, and many USB-C laptops. Choose the Anker 737 (PowerCore 24K), model A1289, when 140W output, a larger display, and three-port charging matter more than size and weight.
Quick verdict: Anker 737 or Anker 20K?
- Buy the Anker 20K (87W, A1383) for the best balance of capacity, portability, and cable convenience.
- Buy the Anker 737 (A1289) if you regularly charge a higher-power USB-C laptop and want a detailed smart display.
- Consider the Anker 25K (A1695) if you travel with several devices and want two built-in cables.
- Choose the Anker Nano 10K (A1638) for a smaller daily-carry battery.
- Choose the Anker Prime 26K (A110A) only if maximum multi-device output is worth the extra bulk and cost.
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How we evaluated these power banks
This comparison is based on current manufacturer specifications, port layouts, capacity, charging output, built-in-cable convenience, and intended use. We also verified that every shopping button points to the exact Amazon.com product listing shown in this guide. We did not assign invented star ratings or claim laboratory testing that was not performed.
Anker power banks compared
| Pick | Model | Capacity | Maximum output | Built-in cable | Best for |
|---|---|---|---|---|---|
| Best overall | Anker 20K (A1383) | 20,000mAh | 87W total; up to 65W to one device | USB-C | Everyday laptop and phone charging |
| Best for 140W laptops | Anker 737 (A1289) | 24,000mAh | 140W | No | High-power USB-C laptops and detailed monitoring |
| Best for multi-device travel | Anker 25K (A1695) | 25,000mAh | 165W total | Two built-in USB-C cables | Travel with a laptop, tablet, and phone |
| Best compact choice | Anker Nano 10K (A1638) | 10,000mAh | 45W | Retractable USB-C | Phones, tablets, and light daily carry |
| Best premium performance | Anker Prime 26K (A110A) | 26,250mAh | 300W total; up to 140W from one USB-C port | No | Several high-power devices |
Important Anker A1681 recall check: The older 20K model previously recommended in this article was model A1681. Anker includes A1681 among the model numbers covered by its voluntary recall serial-number check. This does not mean every A1681 unit is affected. If you own one, use Anker’s official recall page to verify the serial number and follow Anker’s instructions. We have removed A1681 from this article’s recommendations.
1. Anker Power Bank 20K (87W, A1383): Best overall
The A1383 is the most practical choice for the widest range of buyers. Anker specifies a 20,000mAh battery, 87W total output, and up to 65W when charging one device. Its built-in USB-C cable can charge devices and recharge the power bank, reducing the chance that you leave an essential cable at home.
Compared with the Anker 737, the A1383 gives up some capacity and peak output. In return, it is easier to carry and simpler to use. A 65W single-device ceiling is enough for many thin-and-light USB-C laptops and more than adequate for phones and tablets. Always check your laptop’s recommended wattage; demanding mobile workstations may charge slowly or not at full performance.
Pros
- Strong balance of 20,000mAh capacity and portable size
- Built-in USB-C cable reduces cable clutter
- Useful output for phones, tablets, and many USB-C laptops
- Better everyday value than buying more power than you need
Cons
- Lower single-device output than the 140W Anker 737
- Not the best option for power-hungry laptops
- The attached cable is convenient but cannot be replaced as easily as a separate cable
Best for: commuters, students, and travelers who want one battery for a phone and a typical USB-C laptop.
Check the Anker 20K 87W on Amazon
See Anker’s official A1383 specifications
2. Anker 737 Power Bank (PowerCore 24K, A1289): Best for 140W laptop charging
The Anker 737 is the better tool for buyers who prioritize charging output. Anker lists a 24,000mAh capacity, up to 140W output, two USB-C ports, one USB-A port, and a smart display that reports charging information. That makes it especially useful when you need to see how much power a connected laptop is drawing.
The tradeoff is portability. The 737 is heavier and bulkier than the A1383, and you must carry a suitable USB-C cable. It is worth that compromise when your laptop can accept more than 65W or when charging speed during short stops matters. For phone-first use, much of its output will go unused.
Pros
- Up to 140W output for compatible USB-C laptops
- 24,000mAh capacity suits longer work and travel days
- Smart display provides more information than basic indicator lights
- Three ports support mixed USB-C and USB-A devices
Cons
- Heavier and less pocketable than the Anker 20K A1383
- No built-in charging cable
- Extra output is unnecessary for many phone and tablet users
Best for: laptop users, creators, and mobile professionals who can benefit from 140W charging.
See Anker’s official A1289 specifications
Anker 737 vs Anker 20K: the important differences
Charging power
The 737’s 140W maximum is the deciding advantage for compatible high-power laptops. The A1383 provides 87W total and up to 65W to one device, which is a better match for everyday electronics and many portable laptops. A higher wattage rating does not force extra power into a device; USB-C charging negotiates a supported level between the charger and device.
Capacity
The 737 has 24,000mAh versus 20,000mAh for the A1383. Real usable energy is lower than the advertised cell capacity because voltage conversion and heat create losses. Treat charge-count claims as estimates, not guarantees: device battery size, screen use, temperature, and cable quality all affect the result.
Ports and cables
The 737’s two USB-C ports and one USB-A port make it more flexible with older accessories. The A1383’s built-in USB-C cable is more convenient for modern devices, but the amount of power available to each device can decrease when several devices charge simultaneously.
Portability
The A1383 is the easier everyday carry. The 737 makes sense when output and monitoring matter more than weight. For flights, check the watt-hour marking on the unit and confirm your airline’s current carry-on rules before travel.
3. Anker Laptop Power Bank 25K (165W, A1695): Best for multi-device travel
The A1695 is the most travel-focused option in this group. Anker specifies 25,000mAh capacity, up to 165W total output, and two built-in USB-C cables—one retractable and one that can double as a carrying strap. It is designed for a laptop-plus-phone setup where cable management matters as much as raw output.
Pros
- Two built-in USB-C cables
- High total output for charging several devices
- 25,000mAh capacity suits long travel days
Cons
- Bulkier than a 10K or 20K everyday battery
- More expensive than simpler single-device options
Best for: travelers who regularly charge a USB-C laptop, tablet, and phone.
Check the Anker 25K 165W on Amazon
See Anker’s official A1695 specifications
4. Anker Nano Power Bank 10K (45W, A1638): Best compact choice
The Anker Nano A1638 is the sensible choice when a 20K or 24K battery feels excessive. Anker lists 10,000mAh capacity, up to 45W charging, and a retractable USB-C cable. It is a strong match for a phone, handheld gaming device, tablet, or occasional laptop top-up.
Pros
- Smaller and lighter than the high-capacity models
- Retractable USB-C cable is easy to store
- 45W output covers many everyday devices
Cons
- Half the nominal capacity of the A1383
- Not intended for sustained high-power laptop charging
Best for: everyday carry, short trips, and buyers who value size over maximum runtime.
Check the Anker Nano 10K on Amazon
See Anker’s official A1638 specifications
5. Anker Prime Power Bank 26K (300W, A110A): Best premium performance
The Anker Prime A110A sits at the performance end of this lineup. Anker specifies a 26,250mAh battery, up to 300W combined output, up to 140W from a single USB-C port, and up to 250W dual-port input for rapid recharging with compatible chargers. It is built for several power-hungry devices rather than casual phone use.
Pros
- Highest combined output in this comparison
- Can support multiple high-power USB-C devices
- Fast recharging capability with compatible equipment
Cons
- Premium price and substantial size
- Overkill for phones, tablets, and lower-power laptops
- Fastest input performance requires compatible charging hardware
Best for: demanding mobile workstations and users who charge several high-power devices at once.
Check the Anker Prime 26K on Amazon
See Anker’s official A110A specifications
How to choose the right Anker power bank
Match wattage to your largest device
Start with the device that needs the most power. A 45W model is a good portable choice for phones and light devices. A 65W single-device output covers many compact laptops. Choose 140W-class hardware only if your laptop supports it or if faster charging during limited downtime is important.
Choose capacity for the trip
A 10,000mAh battery is easier to carry and often enough for daily phone use. A 20,000mAh model is a versatile middle ground. Capacities near 24,000–26,000mAh make more sense for laptops, several devices, or travel days without easy outlet access.
Decide whether built-in cables are worth it
Built-in cables make travel simpler, but separate cables are easier to replace. If you routinely forget cables, choose the A1383, A1695, or A1638. If you already carry high-quality USB-C cables, the 737 or Prime may offer a better port and output combination.
Compare alternatives by use case
If price is the priority, see our best power banks under $50. Android users can compare connector and charging requirements in our best power banks for Android guide. For a broader brand comparison, read INIU vs Anker power banks.
Frequently asked questions
Is the Anker 737 better than the Anker 20K 87W?
The 737 is better for compatible high-power laptops because it reaches 140W and includes a detailed display. The Anker 20K A1383 is better for most everyday users because it is easier to carry, includes a USB-C cable, and still supplies up to 65W to one device.
Can the Anker 20K 87W charge a laptop?
Yes, it can charge many USB-C laptops, but its single-device output is up to 65W. Check the laptop manufacturer’s recommended charging wattage. A laptop that normally uses more than 65W may charge more slowly or lose battery during heavy use.
Can the Anker 737 charge more than one device?
Yes. It has two USB-C ports and one USB-A port. When multiple devices are connected, available power is divided according to the power bank’s supported output combinations and each device’s negotiated charging level.
Is the recalled Anker A1681 the same as the A1383 recommended here?
No. They are different model numbers. This article recommends A1383. Owners of A1681 should use Anker’s official recall page to check whether their specific serial number is affected.
Which model is easiest to carry every day?
The 10,000mAh Anker Nano A1638 is the most compact pick here. The A1383 is the better compromise if you want substantially more capacity while keeping a built-in USB-C cable.
Final recommendation
Choose the Anker Power Bank 20K (87W, A1383) for the best overall balance. It delivers the capacity most travelers want, includes a useful USB-C cable, and can charge many laptops without the bulk of the 737. Choose the Anker 737 instead when 140W laptop charging and its smart display are worth carrying a heavier battery. The other three picks serve clearer niches: A1695 for multi-device travel, A1638 for compact carry, and A110A for maximum performance.