Anker 321 vs 621 [Power & Performance Compared]

Anker has earned a reputation for delivering reliable, high-performance power solutions. The Anker 321 and 621 are two popular models designed for users who demand efficiency, speed, and convenience.

The 321 targets those who need a compact yet powerful option for daily charging, while the 621 focuses on higher capacity and faster output for heavy-duty use. Both models come with Anker’s signature build quality, smart charging technology, and multiple safety features, making them stand out in a crowded market.

Comparing these devices reveals distinct advantages in battery capacity, charging speed, and portability. Understanding their differences helps buyers pick the perfect fit for their lifestyle, whether for home, office, or travel.

Detailed insights into performance, design, and value highlight what makes each model unique and why one might suit specific needs better than the other. Users can make an informed choice based on clear comparisons.

Anker 321 vs Anker 621

Portable magnetic power banks are essential for keeping your iPhone charged on the go. Anker 321 and Anker 621 are two popular MagGo power banks with wireless charging.

This article provides a detailed comparison, including features, pros, cons, and real-world performance.

Anker 321 MagGo Battery

 

Product Details

The Anker 321 MagGo is a compact magnetic power bank featuring a 5,000mAh battery capacity. Its small size allows it to fit into pockets or small bags, making it ideal for daily use or travel.

It includes built-in wireless charging and USB-C input/output. Its safety features include temperature sensors that monitor heat up to 7,200 times per hour.

Specifications:

• Connector Type: USB Type-C

• Battery Capacity: 5,000mAh

• Color: Black

• Wireless Charging: Yes, MagSafe-compatible

• Safety Features: NTC sensors for temperature monitoring

• Dimensions: 3.7 × 2.5 × 0.59 inches

• Weight: Lightweight, easy to carry

Features

Portable and Travel-Friendly:
The slim and compact design makes it easy to carry in pockets, purses, or backpacks. It weighs only a few ounces, so it does not add bulk during travel.

Magnetic Wireless Charging:
The MagGo magnetic system attaches securely to iPhone 12, 13, and 14 series, allowing hands-free charging while holding or using the phone.

Safety First:
NTC temperature sensors monitor the battery constantly to prevent overheating, ensuring safe charging.

Charge While Recharging:
Users can charge their iPhone while the power bank itself is being recharged, eliminating downtime.

Real-World Use:
Ideal for commuting, work, or short trips where a full-sized power bank is unnecessary. Can provide one full charge for most iPhone 14 models.

What is Good?

• Compact and highly portable

• Reliable magnetic wireless charging

• Built-in safety with frequent temperature checks

• Supports simultaneous device and battery charging

What is Bad?

• Limited to iPhone 12–14 series for best performance

• Magnetic attachment may not work through thick or non-magnetic cases

• Moderate battery capacity may not cover multiple full charges

Overall Opinion

The Anker 321 is a practical choice for users who value portability and safety. It is ideal for daily usage, short trips, or situations where a compact power bank is sufficient.

Anker 621 Magnetic Portable Charger

 

Product Details

The Anker 621 MagGo advances on the 321 by using MiniCell technology, which reduces size and weight while maintaining the same 5,000mAh capacity.

It includes a strong magnetic attachment, USB-C input/output, and comes with a 23.6-inch USB-C to USB-C cable for flexible wired charging.

Specifications:

• Connector Type: USB Type-C

• Battery Capacity: 5,000mAh

• Color: Black

• Wireless Charging: Yes, MagSafe-compatible

• Safety Features: Internationally certified safety standards

• Dimensions: Smaller and lighter than 321

• Extras: USB-C 23.6-inch cable included

Features

Ultra-Compact MiniCell Design:
The internal MiniCell design reduces internal components, resulting in a thinner and lighter device. This allows users to carry it in pockets without noticing the weight.

Ultra-Strong Magnetic Attachment:
Magnets attach firmly to iPhone 14 and 15 series phones, ensuring the power bank stays aligned during use for calls, selfies, or gaming.

Snap Alignment Charging:
The power bank aligns perfectly with the iPhone, preventing disconnections caused by misalignment—a common issue in standard MagSafe chargers.

High Safety Standards:
The device is designed to safely operate at temperatures up to 118°F and meets global safety standards.

Real-World Use:
Excellent for travelers, commuters, or outdoor use. The strong magnetic hold and small form factor make it easier to handle during movement or busy activities.

What is Good?

• Smaller, lighter, and more portable than 321

• Stronger magnetic attachment for newer iPhone models

• Snap alignment prevents charging interruptions

• Includes a USB-C cable for wired charging

What is Bad?

• Slightly higher price than 321

• Still limited to iPhone magnetic-compatible devices

• Battery capacity remains moderate at 5,000mAh

Overall Opinion

The Anker 621 is designed for users who need maximum portability, strong magnetic attachment, and reliable wireless charging for iPhone 14/15. It is perfect for travel, outdoor use, or anyone who carries their phone constantly.

Detailed Comparison for Anker 321 vs 621

Key Differences:

• Size & Weight: 621 is noticeably smaller and lighter due to MiniCell technology.

• Magnetic Strength: 621 holds iPhone 14/15 more securely than 321.

• Extras: 621 includes a USB-C cable for wired charging convenience.

• Price: 621 is slightly more expensive but offers better portability and magnetic alignment.

FAQs

Q1: Can I charge the iPhone and power bank at the same time?

• Yes, both 321 and 621 support simultaneous charging.

Q2: Which one is more portable?

• Anker 621 is smaller and lighter.

Q3: Are these compatible with all iPhone cases?

• Magnetic charging works best with thin, magnetic-compatible cases. Thick or non-magnetic cases may reduce efficiency.

Q4: How safe are these power banks?

• 321 has temperature sensors for monitoring. 621 meets international safety standards, ensuring safe operation.

Q5: Which one is better for travel?

• Anker 621 is smaller, lighter, and easier to carry, making it ideal for travel and outdoor use.

Conclusion

Anker 321: Reliable, portable, safe, and compact. Perfect for daily use and iPhone 12–14.

Anker 621: Smaller, lighter, with stronger magnetic attachment. Ideal for iPhone 14–15 and travel situations where portability and secure attachment matter.

Recommendation:

• Choose 321 if you want a reliable, everyday power bank for moderate use.

• Choose 621 if you need maximum portability, stronger magnetic alignment, and a power bank designed for newer iPhones.