Charging on the go is a must. The Complete Guide to Recommended Mobile Battery Brands

For modern people who carry smartphones, tablets, and laptops, mobile batteries are now an essential item. They are useful in all situations, from daily commuting and school to business trips and unexpected power outages. Many manufacturers such as CIO, UGREEN, Anker, Elecom, and others are continuously releasing new products, offering countless options in capacity, charging speed, and additional features. Many people may find themselves wondering, “Which product is truly the best?”

In this article, we have carefully selected 49 products, from popular items to bestsellers, based on actual purchasing needs. We thoroughly evaluated each product from five perspectives: actual capacity, portability, charging speed (for smartphones, devices, and wireless charging), and more. Along with guidance on how to choose the ideal mobile battery for your lifestyle, we introduce recommended products tailored to different use cases.

Conditions for Choosing the Right Mobile Battery Revealed by Thorough Evaluation of 49 Products

When choosing a mobile battery, many tend to judge solely by the listed capacity. However, the actual usable capacity is only about 60-90% of the nominal value. Additionally, portability, output power, and charging speed of the device are also important factors. In our evaluation, we assessed the 49 products based on the following criteria:

• Actual Capacity: The ratio of usable capacity to the stated capacity
• Portability: Ease of carrying judged by thickness and surface area
• Smartphone Charging Speed: Measured maximum output
• Device Charging Speed: Input power to the battery itself
• Wireless Compatibility: Output during wireless charging

Recommended Mobile Batteries by Use Case

【1st Place】 For Slim & Compact Focus: SMARTCOBY Pro SLIM CABLE (CIO)

Score: 4.6 (as of January 8, 2026) | Retail Price: ¥5,980

CIO’s “SMARTCOBY Pro SLIM CABLE” is a slim mobile battery with an integrated cable. With a thickness of only 1.8cm and an area of 63.77cm², it’s ultra-compact, yet it secures 75.98% of its rated capacity. This is among the top in its class, providing enough capacity to fully charge a smartphone multiple times.

It features an integrated USB Type-C cable, eliminating the hassle of preparing a separate cable. It can deliver up to 39W for fast charging smartphones, with a maximum input of 35W for quick recharging of the battery itself. Even if you forget to charge it the night before, you can quickly prepare it in the morning. Available in black and white, with a 1-year warranty, making it perfect for first-time mobile battery buyers.

Ideal for: People who carry it daily in their bag, those who want a pocket-sized device

【2nd Place】 For Charging Multiple Devices Simultaneously: SMARTCOBY TRIO (CIO)

Score: 4.59 (as of January 8, 2026) | Retail Price: ¥6,970

CIO’s “SMARTCOBY TRIO” is a 20,000mAh large-capacity card-shaped power bank. Equipped with two USB Type-C ports and one USB-A port, it allows simultaneous charging of smartphones, tablets, and earphones.

It maintains 75.23% of its rated capacity, ensuring sufficient usage cycles. It’s about 3.0cm thick but has an area of 65.68cm², making it compact enough to fit comfortably in bags or pockets. With a maximum output of 71W, it can quickly fully charge smartphones, making it highly effective during busy mornings or on the go. Ideal for those who need high output and carry multiple devices.

Ideal for: Business trips or travel with multiple devices, those prioritizing fast charging

【3rd Place】 Balance of Portability and Charging Speed: SMARTCOBY Pro SLIM (CIO)

Score: 4.54 (as of January 8, 2026) | Retail Price: ¥4,818

This 10,000mAh model is characterized by its astonishingly thin profile of just 16mm. It features three USB-C ports, supporting multiple simultaneous charges. The textured surface helps prevent scratches and adds a premium look.

It has an actual capacity ratio of 69.47%, reliably providing the expected number of charges. With a maximum output of 38W, it can cover for forgotten charging needs. The maximum input of 35W allows efficient recharging of the battery. Its slim design, which can be stacked with a smartphone without being bulky, makes it perfect for daily carry.

Ideal for: Those who prioritize slimness, daily portability, and fast charging

【4th Place】 Large Capacity and Compactness Combined: UGREEN Uno Built-in Cable Power Bank

Score: 4.53 (as of December 26, 2025)

UGREEN’s “Uno” series features an integrated USB Type-C cable supporting simultaneous charging of three devices. The display shows real-time charging status, reducing anxiety about remaining battery life.

It achieves a high actual capacity ratio of 82.26%, capable of about two full charges for smartphones from its 10,000mAh capacity. Its compact design with a thickness of 2.0cm and an area of 80.68cm² allows easy carrying alongside a smartphone. With a maximum output of 35W and maximum input of 30W, it offers fast charging speed. Especially recommended for commuters and students.

Ideal for: People who value reliable capacity and carry it daily

【5th Place】 For iPhone Users: Wireless Compatible Zolo Power Bank (10000mAh, 30W, MagGo) (Anker)

Score: 4.52 (as of January 8, 2026) | Retail Price: ¥5,990

Anker’s Zolo series is a wireless power bank compatible with MagSafe, allowing magnetic attachment to iPhones. Made with silicone, it’s gentle on devices and prevents scratches.

Its actual capacity is 86.69% of the stated capacity, with almost no deviation. It offers a maximum wired output of 33W and wireless output of 7.5W, selectable based on usage. Wireless charging is slower, so for urgent charging, using a cable is recommended. It’s portable enough to carry with a smartphone. Worth considering for MagSafe-compatible iPhone owners.

Ideal for: MagSafe iPhone owners, those interested in wireless charging

【6th Place】 Multi-Port & High Power: ELECOM EC-C44LBK

Score: 4.51 (as of January 8, 2026) | Retail Price: ¥6,999

Elecom’s model features two Type-C ports and one Type-A port, offering a rich port selection. The display shows remaining power, compatible with a wide range of devices from smartphones to laptops.

It has a high actual capacity ratio of 78.20%, ensuring the expected number of charges. With a maximum output of 67W, it can rapidly charge all devices, including laptops. The maximum input is also 67W, allowing quick recharging even if forgotten overnight. Its thickness of 3.1cm and area of 78.00cm² make it easy to store in a bag. Ideal for those who need quick charging on the go.

Ideal for: People who need to charge laptops, those requiring multiple ports

【7th Place】 Fusion of AC Charger & Battery: SMARTCOBY Ex03 SLIM PLUG ＆ CABLE (CIO)

Score: 4.48 (as of January 8, 2026) | Retail Price: ¥5,780

CIO’s “Ex03” is a 3-in-1 device with an integrated USB Type-C cable and foldable AC plug. It can be plugged directly into an outlet to charge the device, with pass-through charging for simultaneous charging of smartphones and the power bank.

It has a high actual capacity of 82.28%, greatly reducing worries about running out of power during outings. Its compact size (thickness 2.2cm, area 73.21cm²) supports a maximum output of 36W for quick smartphone charging. Its multifunctionality makes it suitable for commuting, travel, and business trips. Perfect for practical users seeking a 3-in-1 device.

Ideal for: People who want all-in-one functionality, frequent travelers

【8th Place】 High-Speed Wireless Power Bank: MagFlow PB773 (UGREEN)

Score: 4.48 (as of January 8, 2026) | Retail Price: ¥6,825

UGREEN’s “MagFlow” supports high-speed wireless charging according to Qi2 standards. It offers flexible charging options with both wired and wireless modes. The device has an integrated Type-C cable.

Maximum wired output is 36W, wireless output is 25W, providing speeds comparable to wired charging. Its actual capacity is 73.66%, ensuring sufficient power. With a thickness of 2.1cm and an area of 77.87cm², it’s portable. Ideal for those seeking both fast charging and portability.

Ideal for: Users who mainly use wireless charging, owners of high-speed wireless devices

【9th Place】 3-in-1 for Minimal Load: Power Bank (10000mAh, Fusion, Built-In USB-C Cable) (Anker)

Score: 4.47 (as of January 8, 2026) | Retail Price: ¥7,990

Anker’s “Fusion” series features an integrated USB Type-C cable and an AC adapter. Simply plug into an outlet to charge the device, revolutionizing on-the-go charging.

It has an actual capacity of 83.73%, ensuring the expected number of charges even during long trips. With a maximum output of 35W, it can rapidly charge smartphones, and quick recharging of the power bank is also possible. Its thickness is 3.1cm, with an area of 55.34cm², making it compact. Ideal for travelers and business trips aiming to minimize luggage.

Ideal for: Frequent travelers, those who want to streamline their gear

【10th Place】 Ultra-Compact High Power Model: Prime Power Bank (9600mAh, 65W, Fusion)

Score: 4.46 (as of January 8, 2026) | Retail Price: ¥14,990

Anker’s top-tier model combines a USB charger and a power bank into one. It features a foldable plug for direct outlet connection.

It maintains an actual capacity of 81.31%, ensuring stable power supply. Despite a thickness of 4.3cm, its area is only 49.81cm², making it ultra-small. Designed to fit easily into bags or pouches. With a maximum output of 67W and fast recharging, it’s ready for any scene. A premium choice for those with a budget who seek top performance.

Ideal for: Premium users, those carrying multiple devices regularly

Final Note: Priorities When Choosing a Mobile Battery

Charging needs vary from person to person when out and about. For daily commuting, slim and compact models are best; for business trips, large capacity and high output are advantageous; for multiple devices, multi-port support is essential. Matching your lifestyle and carrying style to find the most suitable mobile battery is key to success. Use this manufacturer-specific guide to select a reliable device that meets your needs.