In a world where our devices are our lifelines, running out of battery is not just an inconvenience—it’s a disconnection. For years, the Anker 337 Power Bank, also widely known as the PowerCore 26800, has been a trusted companion for travelers, professionals, and tech enthusiasts. But as technology evolves, does this high-capacity giant still hold its ground? As the main content creator for pvhao.com, I’ve spent over a decade testing portable chargers, and this review cuts through the noise to give you the real story on this iconic device.
What is the Anker 337 Power Bank?
The Anker 337 Power Bank is a portable charger renowned for its colossal 26,800mAh capacity. Its primary mission is simple: to free you from the wall outlet for as long as possible. It’s designed to be a workhorse, capable of charging multiple devices simultaneously, making it an ideal power source for long trips, camping, festivals, or intense workdays when you’re away from a power source. For more portable power guides on this site.
A Deep Dive into the Core Features
To understand the Anker 337, you need to look past the numbers and see how its features translate into real-world performance. This isn’t just about capacity; it’s about usability and reliability.
Colossal 26,800mAh Capacity
The headline feature is its massive battery. A 26,800mAh capacity is enough to charge most modern smartphones, like an iPhone 15, over five times, a Samsung Galaxy S23 over four times, or even a tablet like an iPad Air at least twice. For a week-long camping trip or a cross-country flight, this power bank can be the only one you need.
Triple-Port Charging with Smart Technology
The Anker 337 is equipped with three high-speed USB-A ports. What makes them special is the integration of Anker’s proprietary PowerIQ and VoltageBoost technologies.
- PowerIQ: This technology intelligently identifies your connected device to deliver an optimized charge.
- VoltageBoost: This compensates for cable resistance to keep the charging speed consistently fast.
Together, these features ensure that whether you’re charging an iPhone, an Android device, or a pair of headphones, each receives the fastest possible charge it can safely handle, up to 3A per port.
Dual Micro USB Input for Faster Recharging
One of the most significant challenges with high-capacity power banks is the time it takes to recharge them. Anker addressed this with a clever dual Micro USB input design. By using both included cables and connecting them to two separate USB wall chargers, you can cut the recharge time in half. A full charge takes just over 6 hours, which is remarkably fast for a battery of this size.
“The dual-input charging was a game-changer when the PowerCore 26800 was released. While the industry is moving to USB-C, this feature still makes the recharging process impressively efficient for its class,” notes David Chen, Lead Technician at Pvhao Labs.
Performance in Today’s Tech Landscape
While the Anker 337 Power Bank has a legendary reputation, it’s crucial to evaluate it against modern standards. The tech world moves fast, and what was once cutting-edge can quickly become dated.
Where It Still Excels
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Our Picks for the Best Power Bank in 2026
As an Amazon Associate I earn from qualifying purchases.
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| Num | Product | Action |
|---|---|---|
| 1 | Anker Laptop Power Bank, 25,000mAh Portable Charger with Triple 100W USB-C Ports, Built-in Retractable Cables, Flight-Approved for Travel, iPhone 17/16 Series, MacBook, Samsung, and More |
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| 2 | INIU Portable Charger, Slimmest Fast Charging 10000mAh USB C in/Out Power Bank, 22.5W PD3.0 QC4+ Battery Pack, Portable Phone Charger for iPhone 16 15 14 13 12 Pro Samsung S22 S21 Google AirPods iPad |
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| 3 | 90000mAh High Capacity Power Bank, 30W Fast Charging Portable Charger PD&QC 3.0, 5 Output 2 Input Large Powerbank with LED Display USB C Battery Pack Charger Portable for Outdoor Camping Travel |
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| 4 | INIU Portable Charger, Smallest 22.5W 10000mAh Power Bank, USB C in/Output Fast Charging 3-Output Mini Battery Pack Charger with Phone Holder for iPhone 17 16 15 14 Air Samsung S23 Google iPad Tablet |
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| 5 | UGREEN Power Bank 25,000mAh 145W Laptop Portable Charger, Nexode 3-Port USB C PD Battery Pack, for MacBook Pro/Air, Dell XPS, iPhone 17/16/15/14, Galaxy S24, Steam Deck, iPad, and More |
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| 6 | UGREEN Nexode Power Bank 20000mAh 165W with Built-in USB C Cable Laptop Travel Portable Charger, 100W Input, Fast Charging for MacBook Pro/Air/iPhone 17/16/iPad Pro/Galaxy S25 Ultra/Dell/HP and More |
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| 7 | INIU Power Bank, 25000mAh 100W USB C Laptop Portable Charger, PD QC Fast Charging 3-Output Battery Pack, Travel Charger for Laptop MacBook iPad Tablet Steam Deck iPhone 17 16 15 14 Pro Samsung S25 etc |
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| 8 | Emergency Radio&22000mAh Solar Power Bank, FM NOAA Weather Radio, Portable Hand Crank Bluetooth Radio, 20W Fast Charge Wireless Phone Charger, SOS Flashlight for Emergency/Home |
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| 9 | Anker Laptop Power Bank, 25,000mAh Portable Charger with Triple 100W USB-C Ports, Built-in Retractable Cables, Flight-Approved for Travel, iPhone 17/16 Series, MacBook, Samsung, and More |
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| 10 | Energizer Power Bank 20000mAh - USB-C 20W Outputs Fast Charging Battery Pack, USB-A 18W with 4 Outputs & LCD Screen for Android/iPhone 15 16 Plus Pro Max/iPad Tablet and etc_UE20063PQ |
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- Sheer Capacity: There’s no arguing with 26,800mAh. It remains a top-tier capacity, perfect for power users and off-grid adventures.
- Reliability: Anker’s build quality is exceptional. The matte finish resists scuffs and fingerprints, and its internal components are designed for safety and longevity.
- Multi-Device Charging: For families or individuals carrying multiple USB-A gadgets (like older phones, headphones, e-readers, and smartwatches), the three ports are incredibly convenient.
The Modern Limitations
The most significant drawback of the Anker 337 is its lack of USB-C Power Delivery (PD). This is a critical consideration for anyone with modern electronics.
- No Fast Charging for New Devices: Newer iPhones, Google Pixel phones, and Samsung flagships rely on USB-C PD for their fastest charging speeds. The Anker 337 will charge them, but at a standard, slower rate.
- No Laptop Charging: Without USB-C PD, this power bank cannot charge laptops like MacBooks, Dell XPS, or other USB-C powered notebooks.
- Dated Input Ports: While the dual Micro USB input is innovative, the industry standard is now USB-C, which offers faster and more convenient single-cable recharging.
Who Should Buy the Anker 337 Power Bank?
This power bank isn’t for everyone, but it remains the perfect choice for a specific type of user.
This is the perfect power bank for you if:
- You are going on an extended trip, like camping or backpacking, and need maximum power for several days.
- You primarily use devices that charge via USB-A and don’t require USB-C Power Delivery.
- You need to charge three devices at once and prioritize capacity over cutting-edge speed.
- You value proven reliability and build quality over having the latest technology.
You should consider a different power bank if:
- You need to fast-charge a modern smartphone that supports Power Delivery.
- You want to charge a USB-C laptop.
- You prefer the convenience of a single USB-C cable for both input and output.
Frequently Asked Questions (FAQ)
Is the Anker 337 Power Bank allowed on airplanes?
Yes, it is. The capacity is 96.48 Watt-hours (Wh), which is safely under the 100Wh limit imposed by the FAA and most other international aviation authorities for carry-on luggage.
Can the Anker 337 charge a laptop?
No. It lacks the USB-C Power Delivery (PD) protocol required to charge modern laptops. It is designed for smaller devices like smartphones, tablets, and accessories.
How long does it take to fully recharge the Anker 337?
Using both Micro USB input ports with two high-quality wall chargers, it takes a little over 6 hours. With a single input, the time doubles to around 12-13 hours.
What devices are not compatible with it?
It is not compatible with devices that have a very low power input (below 50mA), such as some GPS devices or Bluetooth headsets. It also does not support Qualcomm Quick Charge technology, though it will charge those devices at a standard speed.
What comes in the box?
The package typically includes the Anker 337 Power Bank (PowerCore 26800), two 2 ft Micro USB cables, a travel pouch, and a welcome guide. A wall charger is not included.
The Final Verdict
The Anker 337 Power Bank (PowerCore 26K) is a testament to reliable engineering. It’s a high-capacity titan that delivers on its promise of providing extensive off-grid power. While it may not boast the latest USB-C PD technology, its massive battery, triple-port output, and robust build quality ensure it remains a relevant and highly practical choice for many users. If your priority is maximum power for your USB-A devices, this power bank is still one of the most dependable workhorses on the market.
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