Complete Guide to Choosing a Mobile Battery: Top 10 Models Revealed by Actual Measurement Data

With the increasing use of smartphones and laptops, the demand for mobile batteries is also rising. Many manufacturers such as CIO, UGREEN, and Anker offer a variety of products, with key points to consider including capacity, charging speed, and size. In this article, we have tested 49 products, including the latest models from popular brands, and selected 10 models based on three criteria: actual capacity, portability, and charging speed.

Mobile Battery Comparison Testing Method

Our evaluation criteria are based on the following five points:

• Actual Capacity Retention Rate: Ratio of measured capacity to labeled capacity
• Ease of Portability: Judged by thickness and surface area
• Smartphone Charging Speed: Measured maximum output
• Device Charging Speed: Input power level
• Wireless Charging Functionality: Supported devices and speed

【For Fast Charging Enthusiasts】Choosing a Mobile Battery by Maximum Output

TRIO (CIO) - The most powerful with 71W maximum output

CIO’s “TRIO” is a high-performance model boasting a large capacity of 20,000mAh and 67W input. It features two USB Type-C ports and one USB-A port, allowing simultaneous charging of smartphones and laptops. It maintains 75.23% of its rated capacity, with minimal discrepancy from the labeled capacity. With a real maximum output of 71W, it can fully charge smartphones in a short time. Ideal for busy travel or outdoor use where rapid charging is a priority. Its thickness of 3.0cm and surface area of 65.68cm² make it compact enough to fit comfortably in a bag.

ELECOM Mobile Battery - Simultaneous high-speed charging of multiple devices at 67W

ELECOM’s “EC-C44LBK” features two Type-C ports and one Type-A port. With a maximum output of 67W, it can quickly charge laptops, greatly improving work efficiency on the go. It has an actual capacity of 78.20%, close to the labeled value, ensuring the expected number of charges. The device itself can be fully recharged quickly with a maximum input of 67W, making it very user-friendly for quick turnaround when charging is forgotten.

【For Portability Focus】Slim and Compact Models with Real Power

SMARTCOBY Pro SLIM CABLE (CIO) - Ultra-thin at just 1.8cm

CIO’s “SMARTCOBY Pro SLIM CABLE” achieves an overwhelming compactness with a thickness of only 1.8cm and a surface area of 63.77cm². It has an integrated USB Type-C cable, eliminating the hassle of carrying an extra cable. It boasts a high capacity retention of 75.98%, with a maximum output of 39W and input of 35W, providing sufficient charging speed. It fits seamlessly in pockets or bags alongside smartphones, making it a balanced model perfect for daily use.

SMARTCOBY Pro SLIM (CIO) - Further compact with 10,000mAh capacity

Despite its small size, it has a capacity of 10,000mAh and a thickness of only 16mm. It maintains 69.47% of its capacity, ensuring enough charges, and supports fast charging up to 38W for quick smartphone recovery. The device itself can be recharged in a short time with an input of 35W. Equipped with three USB-C ports for multiple device charging, it is optimized for everyday use.

UGREEN Built-in Cable Mobile Battery - 10,000mAh with over 82% actual capacity

The “Uno” series achieves an industry-leading actual capacity retention of 82.26%. With a thickness of 2.0cm and a surface area of 80.68cm², it is comfortable to carry alongside smartphones. Supports fast charging with a maximum output of 35W and input of 30W, making it efficient for busy mornings. The display allows easy monitoring of charging status.

【Wireless Charging Support】Next-Generation Charging Experience

MagFlow (UGREEN) - Qi2 compatible with wired-like speeds

UGREEN’s “MagFlow PB773” supports wireless charging with Qi2 standard, delivering 25W output. Wired charging reaches up to 36W, providing comparable speed wirelessly. It secures 73.66% of its capacity, with a compact size of 2.1cm thickness and 77.87cm² surface area. Built-in Type-C cable offers flexibility to switch between wired and wireless charging.

Zolo Power Bank (Anker) - MagSafe compatible, optimized for iPhone users

Anker’s “Zolo Power Bank 10000mAh” is designed for MagSafe, with a magnet to securely attach to iPhone models. Wired charging offers up to 33W, while wireless charging provides 7.5W, so for fast charging, wired is recommended. It has a high actual capacity of 86.69%, and features a silicone exterior to prevent scratches on devices.

【Multi-Function Integrated Models】All-in-One AC Charger

SMARTCOBY Ex03 SLIM PLUG ＆ CABLE (CIO) - Foldable AC plug included

CIO’s “Ex03” combines a USB Type-C cable with a foldable AC plug, allowing charging at home or on the go, significantly reducing travel luggage. It maintains an actual capacity of 82.28%, with stable charging performance, and a maximum output of 36W for quick smartphone charging. Pass-through charging enables simultaneous charging of the battery and connected devices.

Power Bank (Anker) - 3-in-1 design, ideal for travel and business trips

Anker’s “Power Bank 10000mAh Fusion” integrates a USB Type-C cable and an AC adapter. It can be plugged directly into outlets for charging, eliminating the need to carry a separate charger. It has a high actual capacity of 83.73%, with a maximum output of 35W, ensuring practical charging speeds. Despite a thickness of 3.1cm and a surface area of 55.34cm², it remains compact and travel-friendly.

Prime Power Bank (Anker) - 65W high power with foldable plug

Anker’s “Prime Power Bank 9600mAh 65W” features a foldable plug for all-in-one charging. It maintains an actual capacity of 81.31%, with a maximum output of 67W, capable of quickly charging laptops. Although 4.3cm thick, its compact design with a surface area of 49.81cm² makes it easy to store in a bag, reducing the hassle of carrying a separate charger when going out.

Points to Consider When Choosing a Mobile Battery

From the comparison of these 10 models, it becomes clear that selecting based on your specific needs is crucial. If daily portability is a priority, slim models like “SMARTCOBY Pro SLIM CABLE” or “UGREEN Built-in Cable” are good options. For rapid charging of multiple devices, high-output models like “TRIO” or “ELECOM” are recommended. If you often travel or go on business trips, all-in-one AC models like “Ex03” or the “Anker Fusion” series will serve well.

The actual capacity retention rate is also an important indicator. From the tests, retaining over 75% of capacity suggests a number of charges close to the labeled capacity. Balancing portability and charging speed according to your lifestyle is key to choosing a satisfying mobile battery.