Planning a trip to China or looking for a reliable portable charger for everyday use? Choosing between the BOROFONE BJ90 10000mAh and BOROFONE BJ90A 20000mAh power banks depends on how much battery capacity you need, how frequently you charge your devices and how important portability is to you.

Both models are marketed as CCC (3C) Certified power banks and feature dual USB-A outputs, USB-C and Micro USB charging inputs, and LED battery indicators.

The biggest difference is simple: the BJ90 is lighter and slimmer, while the BJ90A provides twice the nominal battery capacity.

BOROFONE BJ90 vs BJ90A – Specifications Comparison

Both models have battery energy ratings below the commonly applied 100Wh airline threshold. However, capacity alone does not guarantee flight acceptance, especially on domestic flights within mainland China, where additional CCC certification requirements apply.

Which BOROFONE Power Bank Should You Choose?

1. Battery Capacity: 10000mAh vs 20000mAh

The BOROFONE BJ90 features a 10000mAh lithium polymer battery, providing a convenient source of backup power for everyday smartphone charging.

The BOROFONE BJ90A doubles the nominal battery capacity to 20000mAh, making it better suited to longer journeys and situations where access to a wall socket is limited.

For example, with a typical 5000mAh smartphone battery, the BJ90 may provide approximately 1–1.5 full charges, while the BJ90A may provide approximately 2–3 full charges. Actual performance depends on conversion losses, cable efficiency and the device being charged.

2. Size and Weight: Which Is More Portable?

The BJ90 weighs just 220g and is 16mm thick, making it easier to carry in a handbag, backpack or travel organiser.

The BJ90A weighs 400g and is 28.5mm thick. Although heavier, its increased battery capacity makes it useful for people who need power throughout longer trips.

Winner for portability: BOROFONE BJ90.

3. Charging Speed and USB Ports

Both power banks feature two USB-A outputs with a combined maximum rating of 5V/2.1A (10.5W).

They also include USB-C and Micro USB inputs for recharging the power bank itself.

Neither model is specified to support USB PD 20W, 22.5W or Samsung 25W Super Fast Charging.

Winner for charging speed: Tie. Both models have the same stated maximum output.

4. Are BOROFONE BJ90 and BJ90A Suitable for China Domestic Flights?

China introduced stricter rules on June 28, 2025, prohibiting power banks without a clear CCC mark, with unclear certification markings or belonging to recalled models or batches on domestic flights.

 

The BJ90 is rated at 37Wh, while the BJ90A is rated at 74Wh. Both are below the commonly applied 100Wh threshold, but the exact unit's valid CCC certification must be confirmed.

 

Power banks must be carried in cabin baggage rather than checked luggage. Check your airline's latest requirements before travelling.

Frequently Asked Questions

1. What is the difference between BOROFONE BJ90 and BJ90A?

The main difference is battery capacity and size. The BJ90 offers 10000mAh and weighs 220g, while the BJ90A offers 20000mAh and weighs 400g.

2. Which BOROFONE power bank is better for China travel?

Both may be suitable if their exact units have valid CCC certification and meet airline requirements. Choose the BJ90 for lighter travel or the BJ90A for greater battery capacity.

3. Can I charge two phones simultaneously?

Yes. Both models feature two USB-A output ports sharing a combined maximum output of 10.5W.

4. Does the BJ90A charge phones faster than the BJ90?

Not based on their stated output specifications. Both have the same maximum combined charging output.

5. Which is better for a long international trip?

The BJ90A is generally more convenient for longer trips because it offers twice the nominal capacity.

6. Are these power banks compatible with iPhones and Samsung Galaxy phones?

Yes, they support compatible smartphones using appropriate USB-A charging cables, although they do not provide modern high-wattage fast-charging protocols.

7. What does 3C Certified mean for a power bank?

CCC, also known as 3C, stands for China Compulsory Certification. It is particularly relevant to the safety requirements applied to power banks on mainland China domestic flights.

8. Is the 20000mAh BJ90A worth choosing over the 10000mAh BJ90?

Choose the BJ90A if longer battery life matters more than weight. Choose the BJ90 if you prioritise a compact, lightweight design.

Final Verdict

For everyday use, commuting and short journeys, the BOROFONE BJ90 10000mAh offers a practical balance of battery capacity and portability.

For extended travel, camping and users who need more backup power, the BOROFONE BJ90A 20000mAh is the better choice.