INIU BI-B5 20000mAh

INIU BI-B5 20000mAh

INIU BI-B5 20000mAh is a mid-range portable charger that can keep you powered for a few days at a time.

INIU BI-B5 at a glance

Key specs


20000 mAh

74 Wh

Dimensions (LxWxH)

5.3 x 2.8 x 1 in

13.46 x 7.11 x 2.54 cm


12.8 oz / 362 g

Charging technology

Charging time: 6 h

High speed charging

Qualcomm Quick Charge

Power Delivery (PD)

Low-current charging

PBE metrics



357.43 mAh/$


55.25 mAh/g

1562.50 mAh/oz


USB Type A

USB Type A

Output: 4.5V=5A, 5V=4.5A, 9V=2A, 12V=1.5A
USB Type A

USB Type A

Output: 4.5V=5A, 5V=4.5A, 9V=2A, 12V=1.5A
USB Type C

USB Type C

Input: 5V=3A, 9V=2.22A, 12V=1.5A
Output: 5V=3A, 9V=2.22A, 12V=1.5A

Flight status

Under 100 Wh

Status: Safe

The power bank is safe to take on board. It's under the specified TSA limit of 100 Wh. Read more about taking power banks on planes.

Other features

Display screen


Overheating protection

Short circuit protection

Surge protection

Overcurrent protection

Overcharge protection

Protective pouch

Charging cable

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Charging capacity calculator

Use the search bar below and find out exactly how many times can the INIU BI-B5 charge your smartphone battery

INIU BI-B5 Power Bank Review

INIU BI-B5 power bank

The INIU BI-B5 is a power bank I find quite affordable, with a 20000mAh capacity and high-speed charging technologies, including Quick Charge 4.0+ and Power Delivery 3.0. Apart from two USB-A ports, I appreciate that this power bank features a single USB-C port that functions as both an input and an output. The fact that this power bank is under the 100Wh limit imposed by airlines makes it ideal for long-distance or international travel. Let’s dive into what features this portable charger has. 

Unboxing video

Charging technology

INIU’s BI-B5 power bank features a 20000mAh Lithium-Polymer battery and a variety of charging technologies such as Fast Charge Protocol (FCP) and Super Charge Protocol (SCP), Power Delivery 3.0, and Quick Charge 4.0+. Quick Charge 4+ (QC 4.0+) is a fast charging technology that allows users to charge devices three times faster than regular 1A USB-A ports. For instance, I can use it to charge the latest iPhones 0 to 52% in just 25 minutes. When charged 100%, this power bank can provide power for up to a week if used casually

INIU Power Bank Ports

In terms of ports, the INIU BI-B5 power bank features two standard USB-A outputs, each with QC4.0+ and a 22W output. It also features an input/output USB type C port that can deliver up to 20W of power. All in all, you’ll be able to charge up to 3 devices simultaneously using this portable charger. More charging information can be seen on the back of the product: 

INIU power bank specs

Contrary to other power banks common in the market, INIU BI-B5 comes with a trickle charging mode. Thus, you can recharge many accessories like AirPods, fitness trackers, and Bluetooth headphones that require a low current to charge safely.

The power bank will charge itself in 6 hours if you use an ultra-fast 18W USB-C adapter thanks to its Power Delivery 3.0 fast charging protocol support. PD 3.0 is compatible with Apple, Samsung, and Google devices. However, depending on the power of the adapter, the charging time varies. For example, using a 20W fast-charging adaptor only takes 3 hours to fully recharge your INIU BI-B5.

On the other hand, if you’re using a 5V/2A adapter instead of an 18W one, the BI-B5 will charge in 10 hours instead of 6. Furthermore, if you go with just a 5V/1A adapter, then you can expect the charging time to lengthen to 20 hours. This is why choosing a fast charging adapter is key, regardless of the power bank you want to go for. 


This power bank is a bit hefty for me, weighing nearly one pound (12.8oz) and measuring 5.3x 2.8×1.0 inches. This makes it rather large for carrying it in a pocket although it can be done. Size-wise it’s very similar to a smartphone only 3 times as thick. However, if I were to carry it in a bag or backpack, I wouldn’t even notice that it’s there. Considering the generous capacity, this is a great portable charger to take with me on longer trips, even outdoors. 

INIU power bank specs

Since 20000mAh is the equivalent of 74Wh, this means that the BI-B5 is well under the 100Wh limit imposed by the TSA. So you can take this power bank with you on any flight without needing permission from the airline. 

Look and feel

There’s nothing dowdy about the INIU BI-B5. The rubberized structure helps in grip, so you won’t have to worry about it slipping out of your hands. The power bank’s screen is glossy, giving it a modern and stylish appearance despite BI-B5’s foamy structure elsewhere. The surface is not fingerprint-prone, not even the glossy screen. You can handle it without leaving noticeable marks. 

INIU portable charger

Compared to power banks with LED indicators, the high-resolution screen on BI-B5 shows how much juice is left, making it a better option because it can display the exact amount of charge remaining. When charging a device using one of the compatible fast charging technologies, you’ll see a lightning bolt symbol (↯) show up on the screen. This way you’ll know that your device is fast charging. If the power drops under 10% you’ll notice that the LED digits will start blinking. 

Moreover, this model includes a handy LED flashlight that can be activated by double-tapping the right-side button. Even though the light it emits is not extremely powerful, you can use it to read in low-light rooms or late at night. In order to turn on the flashlight, you’ll need to press the power button twice. 

With a pouch in the box, INIU’s power bank can be easily transported because it protects it against accidents. Besides the traveling pouch, this power bank also comes with a USB type C to USB type C charging cable, which is rather short. 

Durability & build quality

In terms of durability, INIU BI-B5 has a lot to offer. It has a sturdy build and it’s shock-resistant thanks to its rubberized texture. It is also scratch-resistant, however, it does have a weak point which is the display screen. If you’ll be carrying it in your backpack alongside other objects, especially metal ones, you may see scratches developing on the screen over time. 

Unfortunately, it’s not waterproof, so you need to keep it away from liquids. However, it does come with an above-average warranty of 3 years. Considering that most other power banks offer a one or two-year warranty, it is easy to see that INIU stands behind its products. 

My experience with the INIU BI-B5

One of the things I like most about the BI-B5 is its velvety feel. The type of plastic they used for the casing is really fine to touch. Once you hold it in your hand, you immediately see the difference between this power bank and others. It’s details such as this one that sets INIU apart from most other manufacturers. 

In terms of usage, I really like to take advantage of its powerful capacity during long road trips. I know for sure it will top up my phone 2-3 times over easily, while the phone is consuming a lot of power with navigation apps and YouTube videos in the background. I can’t charge my phone via the car cigarette port because of the ground loop effect, so I always use power banks instead. And the BI-B5 is one of my top favorites for this job. 

I also took it on some longer hiking trips, however, I did feel its weight in my backpack. This is not a light power bank. If I did not end up using most of its charge after a trip, I then wished I’d take something lighter instead. 

What Others Say About It

An all-around high performer that also won’t break the bank.David Wise
This is a top “everyday” power bank. Michael Barton

Pros and Cons



Generous 20000mAh capacity

Leading-edge fast-charging technology (QC 4.0+ and PD 3.0)

Compatible with all smartphone devices

Supporting low-current charging mode

Eye-catching design

TSA Approved



A bit bulky and heavy

Shockproof, but with screen vulnerable to scratching

Final Thoughts

INIU BI-B5 PD3.0 20000mAh is a 3X super-fast-charging power bank that offers dual Quick Charge 4.0+ USB-A outputs and a USB-C, working both as input and output. Its generous capacity refills an average phone battery in less than an hour. Also, the rubberized casing protects it from scuffs and knocks, although the screen is still vulnerable. This power bank is recommended for those searching for a stylish but robust power bank that can keep their devices charged for a few days at a time.

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