Anker’s 737 Power Bank (PowerCore 24K) is still one of the few pocketable batteries that can push a full 140 watts into a single laptop. According to Anker’s product page, it holds 24,000mAh, has two USB-C ports and one USB-A port, and recharges to 100% in 52 minutes with a 140W charger. I went through Anker’s spec sheet, port charts and FAQ line by line to work out what this means for travel, work and off-grid trips.
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Quick verdict
The 737 is a good fit if you carry a USB-C laptop and want one battery that can top it up fast, refill itself quickly over lunch and still fit in a carry-on. It’s less ideal if you mostly charge phones, since you’d be paying for laptop-class power you won’t use.
- Best for: MacBook Pro and Windows laptop owners, travelers and remote workers.
- Standout: 140W from one USB-C port (PD 3.1), and 140W input.
- Price on Anker’s store today: $109.99 (Oct. 17, 2026).
Check the Anker 737 price on Amazon | Anker’s 737 product page
Anker 737 specifications
All figures below come from Anker’s A1289 product page unless I’ve marked them otherwise.
| Spec | Anker 737 (PowerCore 24K) |
|---|---|
| Model | A1289 |
| Capacity | 24,000mAh (about 86.4Wh, my estimate at 3.6V nominal) |
| Ports | 2 x USB-C, 1 x USB-A |
| Max total output | 140W |
| USB-C1 / USB-C2 output | 5V⎓3A, 9V⎓3A, 15V⎓3A, 20V⎓5A, 28V⎓5A |
| USB-A output | 5V⎓3A, 9V⎓2A, 12V⎓1.5A (18W max) |
| Input | USB-C1 only: up to 28V⎓5A (140W) |
| Recharge time | 52 minutes to 100% (Anker’s internal testing) |
| Size | 6.13 x 2.15 x 1.95 in (155.7 x 54.6 x 49.5 mm) |
| Weight | 22.22 oz (630 g) |
| Display | Smart digital display |
| Warranty | 24 months |
The 28V⎓5A profile is the important line. It’s the USB Power Delivery 3.1 extended-power level, and it’s what lets the 737 reach 140W. Older 20V⎓5A banks stop at 100W.
Port-by-port power map
Anker’s charging guide shows how the 140W budget is shared when you plug in more than one device:
| What’s plugged in | Power available (per Anker) |
|---|---|
| USB-C1 or USB-C2 alone | Up to 140W |
| USB-A alone | Up to 18W |
| USB-C1 + USB-C2 | 140W combined |
| One USB-C + USB-A | USB-C up to 100W, USB-A up to 18W |
| All three ports | USB-C1 + USB-C2 up to 122W combined, USB-A up to 18W |
In practice: plug your laptop in by itself when you need the fastest charge. Adding a phone to the USB-A port caps the laptop port at 100W, which is still plenty for most 13- and 14-inch machines.
Anker’s FAQ adds one condition. To actually see 140W, you need a cable rated for PD 3.1 (240W or 5A EPR) and a laptop that accepts PD 3.1 input. Anker names the 2021 16-inch MacBook Pro as an example. With a regular 100W cable, the bank tops out at 100W.
Runtime math: how far 24,000mAh goes
Anker says the 737 charges an iPhone 13 up to five times or an iPad Pro about 1.3 times. The current Amazon listing quotes 4.13 charges for an iPhone 16 Pro and 1.33 charges for a 2024 13-inch iPad Pro. For laptops and gear Anker doesn’t list, I worked from the device makers’ published battery sizes and assumed about 65–75% of the pack’s energy reaches the device, which is about 56–65Wh. That range lines up with Anker’s own iPhone 16 Pro figure, since every charge loses some energy to heat and voltage conversion. Treat these as estimates.
| Device | Battery (maker spec) | Estimated charges from 737 |
|---|---|---|
| iPhone 16 Pro | n/a | 4.13 (Anker’s Amazon listing) |
| 2024 13-inch iPad Pro | n/a | 1.33 (Anker’s Amazon listing) |
| MacBook Air 13-inch (M2) | 52.6Wh | ~1.1–1.2 (estimate) |
| MacBook Pro 16-inch (2021) | 100Wh | ~0.6 (estimate) |
| Steam Deck | 40Wh | ~1.4–1.6 (estimate) |
| Starlink Mini (25–40W average draw) | none | ~1.4–2.6 hours runtime (estimate) |
The pattern is simple. A 737 gives a thin-and-light laptop about one more full charge, adds more than half a charge to a big 16-inch machine, and covers a weekend of phone charging with room to spare.
What the smart display shows
The screen is what sets the 737 apart from most banks its size. Based on Anker’s product images and FAQ, it shows:
- Battery percentage
- Live wattage on each of the three ports
- Estimated time to empty or full
- A settings page with screen time, battery cycle count, battery health, and total energy in and out
The live wattage is useful for checking whether your cable really supports 140W. If the laptop port shows about 60W when you expected 100W or more, the cable is usually the limit, not the bank. The battery health and cycle readout also make it easy to keep an eye on aging over the years.
One tip from Anker’s FAQ: the settings screen draws about 0.36W if you leave it on. Anker says that uses about 15% of the battery over 24 hours, so close that screen when you’re done.
Anker also notes that a new unit can show non-zero totals for screen time and energy in and out, because each one is tested at the factory. On a fresh unit, cycle count should read 0 and battery health 100%.
Recharging in under an hour
Recharging is the 737’s other strong point. Only USB-C1 accepts input, at up to 140W. Anker’s marketing graphic puts a full recharge at 52 minutes, compared with seven hours for what it calls a standard portable charger. The Amazon listing notes you’ll need a 140W charger and a 5A cable to get that speed.
With a 65W laptop charger it will still recharge, just more slowly. My estimate is about 1.5 to 2 hours, depending on how long the charger holds full power. If your laptop and the bank share a multi-port charger, the bank will get whatever power is left over, so it will charge more slowly.
For trips, I’d pair it with a compact 140W GaN wall charger. One charger plus one 5A cable then covers the bank, your laptop and your phone.
Flying with the 737
At about 86Wh (my estimate from 24,000mAh x 3.6V), the 737 sits below the 100Wh line that U.S. airlines use for carry-on lithium batteries without airline approval. Anker’s Amazon listing also calls it airline-safe. Keep it in your carry-on, never in checked bags. My best power banks for travel guide compares other banks under 100Wh.
Can it run a Starlink Mini?
Starlink’s spec sheet says the Mini needs USB PD at 100W, 20V/5A minimum, when you use Starlink’s USB-C to barrel jack cable. Average draw is 25–40W. The 737’s USB-C ports both list a 20V⎓5A profile, so on paper it meets that requirement.
Based on the runtime math above, expect roughly one and a half to two and a half hours of internet (estimate). That’s enough for a work call or a few hours of streaming at a trailhead, not a full day. For all-day use, a dedicated DC bank like the XTAR MP158 or a small power station makes more sense. My Starlink Mini USB-C power guide covers the cables. Use a 5A-rated cable, like the STARGEAR retractable cable.
737 vs Anker Prime 26K 300W
Anker’s newer Prime 26K is the step up. Here’s how they compare at a glance; my full Anker Prime 26K 300W review has the details.
| Anker 737 (24K) | Anker Prime 26K 300W | |
|---|---|---|
| Max output | 140W total | 300W total |
| Capacity | 24,000mAh | 26,250mAh (99.75Wh) |
| Ports | 2 C + 1 A (USB-A 18W) | 2 C + 1 A (USB-A 22.5W) |
| Input | 140W, USB-C1 | 140W per port, 250W with both ports, plus 150W charging base |
| Weight | 630 g | 600 g |
| App control | No | Yes (Bluetooth) |
| Price, Anker US (Oct. 17, 2026) | $109.99 | $229.99 |
If you charge one laptop at a time, the 737 does that job for less than half the price. The Prime is for people charging two laptops at once at full speed.
Who should pick something else
- Phone-only users: a lighter 10,000–15,000mAh bank like the LOVELEDI 15000mAh is easier to carry.
- Campers running fridges or lights for days: step up to a power station. My best power banks for camping guide covers the middle ground.
- Anyone who needs 12V barrel or AC output: the 737 is USB only.
What’s in the box
Anker’s own page lists the 737, a welcome guide and the 24-month warranty. The current Amazon listing also includes a 140W USB-C to USB-C cable and a travel pouch. Check the listing you buy from, since bundles can change.
FAQ
Does the Anker 737 charge a MacBook Pro at full speed?
Yes, up to 140W from one USB-C port, if both the cable and the MacBook support PD 3.1. Anker uses the 2021 16-inch MacBook Pro as its example.
How many watt-hours is the Anker 737?
Anker lists 24,000mAh. At a 3.6V nominal cell voltage, that’s about 86.4Wh. That’s my calculation, not an Anker figure.
Can I take it on a plane?
Yes, in your carry-on. It’s under 100Wh by my estimate, and Anker’s listing calls it airline-friendly.
Why does the USB-A port show 0.1W with nothing plugged in?
Anker says the port keeps a trickle current flowing for about two minutes after you unplug a device, and shows 0.1W in low-current mode. That’s normal.
Which port do I use to recharge it?
USB-C1. It accepts up to 140W.
Is the 737 the same as the PowerCore 24K?
Yes. Anker sells it as the “Anker 737 Power Bank (PowerCore 24K),” model A1289.
Bottom line
The Anker 737 has a clear specialty: 140W into one laptop and 140W back in, in a 630-gram brick with a screen that shows exactly what’s happening. For laptop users who travel, it’s an easy recommendation at its current price. Anyone who mostly charges phones can save weight and money with a smaller bank.
One reply on “Anker 737 Power Bank Review (PowerCore 24K): 140W for Laptops”
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