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  4. realme Power Bank 2 review ~Affordable & safe, high-capacity mobile battery~

realme Power Bank 2 review ~Affordable & safe, high-capacity mobile battery~

2025 12/23
Gadgets Mobile battery
realme Review
2025年12月23日
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The battery is dead, so I can’t make payments with electronic money…

I forgot to charge my earphones…

A mobile battery that solves these problems.
It is now becoming a necessity for modern people.

Even when it comes to mobile batteries, there are various types such as those that are small and easy to carry, and those that can charge quickly in any way, and there are various differences in charging speed, capacity, and other aspects, each with its own personality.

The 『realme Power Bank 2』, which we will introduce this time, has a large capacity of 20000mAh for 2980 yen.
Anyone can carry this with them and they don’t have to worry about running out of charge in their daily life!

In this article, we will summarize the important points to consider when choosing a mobile battery and the brand of this mobile battery, as well as who we recommend it to.

realme Power Bank 2 ブラック 20000mAh Portable Chargers 大容量 急速充電 iphone android type-c type-A 充電ケーブル付属 防災 【日本正規代理店品】
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realme Power Bank 2
Overall Rating
( 4.5 )
Pros
  • Incredibly cheap for its capacity
  • Large capacity of 20000mAh
  • Supports various fast charging standards such as PD and QC
  • Can charge 3 devices simultaneously
  • High safety and reliability
  • Equipped with low power mode
Cons
  • Low power mode is up to 2 hours
  • Large and heavy
TOC

Basic Information on realme Power Bank 2

What kind of company is realme?

『realme』 was originally a sub-brand for younger generations of OPPO.
Currently, it has become independent from OPPO and mainly sells smartphones and IoT products for young people in emerging countries.

Global smartphone market share in September 2022

Data source (September 2022)
https://gs.statcounter.com/vendor-market-share/mobile/worldwide

The pie chart above shows the global smartphone market share (September 2022).
realme boasts a 7th share of the world, and has a fairly high reputation worldwide.

Mr. Gadget

Japanese companies’ smartphones such as Sony’s Xperia and Fujitsu’s arrows are not widely used in the world, so unfortunately they are classified as others.

They entered the Japanese market in April 2021 and it is still a short time, and they have not entered the Japanese market with their main smartphones, but only with IoT products such as smartwatches and earphones.

Specifications

スクロールできます
 Battery Capacity 20000mAh Color Yellow/Black
 Input 18W SizeAbout  150mm × 72mm × 27.5mm
 Output 18W Weight About 495g
 Number of Output Ports 3 (USB-C × 1 / USB-A × 2) Actual Weight 427.7g (measured by this site)
Specifications of the 『realme Power Bank 2』
スクロールできます
 Input (USB-C) 5V 3.0A (max) 9V 2.0A (max) 12V 1.5A (max)
 Output Single Port (USB-C) 5V 3.1A (max) 9V 2.0A (max) 12V 1.5A (max)
 Output Single Port (USB-A) 5V 3.1A (max) 9V 2.0A (max) 12V 1.5A (max)
 Output Multi-Port 5V 3.1A (max)
 Fast Charging Standard USB-PD/QC/PE/AFC
Specifications of the 『realme Power Bank 2』

In addition, a low current mode is available for IoT products such as realme’s wireless earphones and wearable devices.

Especially Important Points When Choosing a Mobile Battery
  1. Battery Capacity
  2. Output Size (Charging Speed)
  3. Number of Ports (Number of Devices That Can Be Charged Simultaneously)
  4. Safety
  5. Size and Weight (Portability)

Keep these points in mind to choose a battery that suits your purpose and use.

Based on these points, the features of the 『realme Power Bank 2』 are as follows:

Features
  • Very large capacity of 20000mAh
  • Fast charging of 18W
  • Can charge 3 devices simultaneously
  • Thorough circuit protection
  • Equipped with low power mode

Also, there was a difference of about 70g between the actual weight and the official specifications.

Actual weight of 『realme Power Bank 2』 (measured by Mister Gadget)
Actual weight of 『realme Power Bank 2』

The actual weight of the 『realme Power Bank 2』 was 427.7g.
To be honest, it’s quite heavy.

Size of the 『realme Power Bank 2』 body
Size of the 『realme Power Bank 2』 body

The smartphone in the picture is the nostalgic iPhone 6s.
In terms of size, it is about the same as recent smartphones or even larger.

Included Accessories

Included accessories of 『realme Power Bank 2』
Included accessories of 『realme Power Bank 2』
  • Main unit
  • Manual
  • 2-in-1 cable

The manual was fully translated into Japanese.

Cable of 『realme Power Bank 2』
Cable of 『realme Power Bank 2』

The cable is a 2-in-1 cable that can be used with both Micro USB Type-B and Type-C, not a normal Type-C cable.

Many earphones and other IoT products still use Micro USB Type-B, so it is a consideration for charging IoT products, which is a thoughtful gesture from realme!

Mr. Gadget

Honestly, I think it’s a secret that I don’t even use these included cables (lol)

Exterior

Front of the 『realme Power Bank 2』 box
Front of the 『realme Power Bank 2』 box
Back of the 『realme Power Bank 2』 box
Back of the 『realme Power Bank 2』 box
『realme Power Bank 2』 body
『realme Power Bank 2』 body
Output ports of 『realme Power Bank 2』
Output ports of 『realme Power Bank 2』
Output Single Port (USB-C)
Output Single Port (USB-C)
Output Single Port (USB-A)
Output Single Port (USB-A)
Output Multi-Port
Output Multi-Port
Side of the 『realme Power Bank 2』
Side of the 『realme Power Bank 2』

Occasionally, cheap mobile batteries from Amazon do not have a PSE mark, which is a violation of the law, but this 『realme Power Bank 2』 of course has a PSE mark.

Actual Usage

Super Large Capacity and 3 Ports, So It’s Very Satisfying

Using 3 ports of 『realme Power Bank 2』
Using 3 ports of 『realme Power Bank 2』

The 『realme Power Bank 2』 has a super large capacity of 20000mAh and 3 ports, so it can basically solve your daytime charging problems with just this one!

For reference, the iPhone 14 Pro has a capacity of 3200mAh, so in terms of capacity alone, the 『realme Power Bank 2』 has about 6 times the capacity.
However, the actual capacity is reduced by losses when converting voltage during charging.
Therefore, the actual capacity is about 60-70% of the battery capacity.
In the case of the iPhone 14 Pro, it can be fully charged about 4 times.
However, this happens with any battery.

You can simultaneously charge 3 devices, such as earphones, smartphones, and tablets.

Safe and Secure Design, Circuit Protection

Circuit protection of 『realme Power Bank 2』
Circuit protection of 『realme Power Bank 2』

You can see that there are various protective functions!
I haven’t seen a mobile battery with as many as 14 protective functions.

As I mentioned earlier, realme is the 7th largest smartphone share in the world, so its reliability is different from unknown brands.

Mobile batteries are dangerous as they may explode or catch fire.
As a general rule, it is better to choose a reliable brand for batteries.

Mr. Gadget

Especially avoid unknown manufacturers that advertise “Latest 2022” or similar.
The batteries swell quickly and are dangerous (experienced people talk)

Low Power Mode to Prevent Battery Degradation

Generally, it is written in the manuals of earphones and wearable devices that charging at low power such as 5V/1A is desirable.

This function helps prevent the battery degradation of such devices.
It’s easy to do: just double-press the power button to switch to low current mode.

Mr. Gadget

It’s a realme-like consideration to focus on IoT products!

However, it is limited to a maximum of 2 hours, so be careful.

Maximum Output of 18W is Moderate

It charges smartphones, tablets, and other IoT products reasonably quickly, but it is not enough to charge laptops.

It supports fast charging standards such as USB-PD/QC/PE/AFC.
If you are concerned about other standards, please check carefully.

Large and Heavy, So It’s Not Easy to Carry

Actual weight of 『realme Power Bank 2』 (measured by Mister Gadget)
Actual weight of 『realme Power Bank 2』
Size of the 『realme Power Bank 2』 body
Size of the 『realme Power Bank 2』 body

As I mentioned earlier, this mobile battery is honestly heavy and large.
As shown in the picture, the weight is over 400g, which is about the weight of a bottle of beverage sold commercially, and the size is as large as or larger than recent smartphones.

Lightweight mobile batteries are available for around 180g for 10000mAh, so it’s questionable whether people who want to carry it easily can carry a mobile battery weighing over 400g.

It depends on the use case, and if you always have a full bottle of beverage in your bag, it may not be a big deal.
Portability is a trade-off with performance and safety.

Summary

The Incredibly Cheap realme Power Bank 2 is a Must-Buy

How was it?
The price at the time of writing this article is 2980 yen, which is very cheap, yet it has such a large capacity and high performance, and is safe, which is really amazing.

When purchasing on Amazon, you can choose Amazon.co.jp as the seller, which reduces the possibility of dealing with malicious sellers.

There are other mobile batteries

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realme Review

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