Which power bank can I take on a plane?

All of the power banks in our guide here are flight safe and can be taken on a plane without worry. But what are the rules for power banks on flights? Any power bank up to 100Wh (27,00mAh) can be taken on a flight without airline permission. You can carry multiple power banks (up to 20 with Qantas) but check with your airline as the limits can vary. The power bank has to be in your carry on luggage, not in your checked luggage. So 10,000mAh (37Wh), 20,000mAh (74Wh) power banks are fine, but not 30,000mAh (111Wh). For power banks over 100Wh (27,000mAh) but less than 160Wh (43,000mAh), you can get airline permission (see the check in desk) to carry up to two devices in your carry on luggage. Anything larger than 160Wh (like a power station) must be sent as freight. The above rules apply to all devices with batteries, but all laptops and tablets are under the limits. It also applies to other batteries, like 18V tool batteries. Most batteries or power banks include the Wh rating on the label, but if in doubt, look it up online.

Which power bank is better – 10,000 mAh or 20,000 mAh?

Both are great, but suited to different uses. A 10,000 mAh (37 Wh) power bank is generally best for charging phones or other smaller devices. It's also small enough to fit in a bag or pocket and is ideal for day-to-day use. A 20,000 mAh (74 Wh) power bank, on the other hand, is bigger and heavier, and won’t fit into a pocket easily. A 20,000 mAh capacity is great for giving phones multiple charges or topping up power-hungry devices from tablets through to laptops. In contrast, little 5,000 mAh (18.5 Wh) power banks are extra compact and great for quickly topping up a phone during a long day. You can also get even larger-capacity power banks up to 50,000 mAh that can charge devices many many times over.

How many times will a power bank charge my phone, laptop or other device?

It all depends on the size of the battery in your device, and you can read more about how to compare it for yourself below. But generally, a 10,000 mAh (37 Wh) power bank will charge a phone one or two times, and is a good choice for getting through a long day. A 20,000 mAh (74 Wh) power bank will manage three to four phone charges and can fully charge a tablet. Laptops batteries vary a lot in size, and a 20,000 mAh (74 Wh) power bank will typically give between 0.5 and 1 full charge.

Are wireless power banks worth it?

There are a range of wireless power banks available that can directly attach to your phone using MagSafe. This isn’t just for iPhones either – any phone with a MagSafe compatible case and wireless charging will work. The magnetic attachment is usually strong enough to stay on when being used, whether in a bag or pocket, or when using the power bank as a phone stand. Keep in mind that while wireless charging is very convenient, it is typically slower and less efficient than wired charging.

What other power bank features are important?

All the power banks we recommend feature fast charging at 18W or more, but models that support extra fast charging at 25W or higher can be a great way to juice up a compatible phone (like the Samsung Galaxy range) much faster than normal. For charging a laptop, you typically need a 20V capable power bank, at 65W output or higher. Pass-through charging means you can plug the power bank into the wall and into your device, and both with then charge without needing to swap over cables. We recommend power banks with displays so you can see the remaining charge percentage, or even voltages and wattages when in use.

What is the difference between mAh and Wh?

Power banks are typically rated in mAh (like 10,000 mAh), but also have a Wh rating like 37 Wh. So what do these numbers mean? mAh is milliamp hour, and is the measure of a battery's capacity at a specific voltage. For power banks, this voltage is typically 3.7V (but can vary), and generally you can directly compare mAh ratings between power banks. Wh (Watt hour) is also a measure of a battery bank's capacity, but one that can be compared between any device with a watt hour rating, even a laptop or a phone. Most power banks include a Wh rating and it is the ideal way to compare capacity. Wh is simply Ah multiplied by the voltage. So, for example, 10,000 mAh is actually the same as 10Ah and to get the watt hour of a device, applying that formula is simply 10 Ah x 3.7V = 37 Wh. So, for power banks, 10,000 mAh and 37 Wh mean the same thing. Wh is important because it can also be used to compare to any other type of battery. For example, a power bank might have a 37 Wh capacity, a laptop could have a 90 Wh battery, an electric scooter battery could be 500 Wh, and an electric car battery might be 70,000 Wh (70kWh)! We always list both mAh and Wh in our reviews.

Why doesn’t my power bank give the full capacity listed?

The rating provided by a brand for a power bank is for the internal battery capacity, but when converting the power from the battery into the right voltage to charge your device, some of the power is lost as heat. This means most power banks only give 80% to 90% of the rated capacity. At very high outputs (100W or higher) it is normal for the efficiency to drop a little. Better power banks are more efficient, and we don’t recommend any power banks that have less than an 80% efficiency rating for normal use. Some power is also lost as heat when the device being charged, so you can expect around 70% of the rated capacity is what will be available to top up your device.

How can I tell how many times a power bank will charge my device?

It various from device to device, but a good rule of thumb is that around 70% of the power bank's capacity will make it into the battery of a device being charged. For example, if using a 20,000 mAh (74 Wh) power bank, about 14,000 mAh (52 Wh) will make it across. The next step is to check the capacity of the battery in your device – you can mostly find these with an online search or in the manufacturer's specs. For example, a 13-inch Macbook Air M3 has a 14,216 mAh (52.6 Wh) battery. If using a 20,000 mAh (74 Wh) power bank, 70% means 14,000 mAh (52 Wh) will make it into the Macbook Air, giving it just about a full charge. The same works with phones. A Samsung Galaxy S24 Ultra has a 5,000 mAh (18.5 Wh) battery, so a 10,000 mAh (37 Wh) power bank (70% means 7,000 mAh / 26 Wh makes it across) will charge the S24 Ultra 1.4 times.

What voltage and wattage do I need to charge my device?

Not to be confused with Watt hour (Wh), power banks also have a W (Watt) rating. This is a measure of how fast a power bank can charge your device. Most phones charge at between 18W and 30W – though some models (such as Samsung) can charge much faster. Charging for phones is usually at 9V. Laptops typically need 20V and at least 30W. Many can use up to 100W, or even 140W. We specifically note if a power bank we recommend has a 20V output, it is good for laptop charging. And don't worry, a high W rating can't cause any harm to a device as it is an 'up to' rating. For example, a phone might only need 20W, but if plugged into a 100W power bank, the phone will only use 20W.

What do terms like QC3.0, PD3.0, and PPS mean?

These terms are the language a USB charger (including power banks) can use to talk to a device like a phone or laptop, and figure out what voltage and wattage is needed for charging. USB-C supports the PD specification, and all modern phones can charge using PD3.0, while some include the latest advancements in the PD3.1 spec like PPS. QC3.0 or 4.0 is Qualcomm Quick Charge – a charging protocol that used to be very common for phones and is still used in a lot of USB-A ports and wireless charging. PPS is Programmable Power Supply and is a more advanced way for devices to charge faster and more efficiently. For example, Samsung Super Fast Charging uses PPS. If PPS is not available, the phone will automatically charge using PD3.0, but not quite as fast.

Best power banks in Australia

PRICE

VERDICT

REASONS TO BUY

REASONS TO AVOID

VERDICT

REASONS TO BUY

REASONS TO AVOID

Jump to:

Quick list
Best overall
Best budget
Best premium
Best Compact 140W
Best form factor
Best compact
Best budget 20K
Best 30W
Best MagSafe
Best 65W
FAQs
How we test
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Best power bank: Quick menu

cluster of power banks — (Image credit: TechRadar)

The list in brief
1. Best overall
2. Best budget
3. Best premium
4. Best compact 140W
5. Best form factor
6. Best compact 10K
7. Best budget 20K
8. Best 30W output
9. Best magnetic wireless
10. Best 65W

Power banks have become essential accessories for modern life, offering a convenient way to keep your phone and devices powered up while you’re on the go. They come in various sizes and capacities, ranging from compact 10,000mAh models for quick top-ups to larger 20,000mAh options capable of charging laptops. These larger models are particularly useful for travel.

Choosing a reliable power bank is important, as the market is filled with low-quality options that often exaggerate capacity or deliver poor efficiency. Every power bank we recommend undergoes rigorous testing to identify potential flaws. Our list includes trusted brands such as Anker, ZMI, Ugreen, INIU, Romoss, and Baseus, as well as hidden gems from lesser-known manufacturers.

MagSafe wireless power banks were once exclusive to Apple devices. However, many phone cases now enable MagSafe compatibility for other major brands, making wireless charging on the go more accessible. Every power bank we feature is also flight-safe, ensuring you can bring it along on your travels without concern.

In our reviews, we explain how many charges a power bank can provide for your phone or laptop and whether it supports fast charging. We also test additional features such as pass-through charging and low-current modes. Since product specifications on sites like Amazon can sometimes be misleading, we personally verify details including dimensions and weight.

For more advice on choosing the best power bank, understanding your device’s charging protocols, or comparing capacities, explore the detailed FAQ section at the end of this guide.

Written by

Lindsay Handmer

Lindsay is a long-serving contributor to TechRadar, handling testing and reviews across a wide range of products. When not trying to collect and test every last power bank available, he's usually found tinkering with electronic projects like off-grid solar power or boating on Australia’s magnificent waterways.

The quick list

Ready to jump straight to the best power banks? Take a look below – then explore our detailed reviews and testing results further down the page. If you find one that meets your needs, our price comparison tool will ensure you get the best deal.

Best overall

ZMI No.20

Best bar none

The mighty ZMI No.20 is one of the best power banks money can buy. It’s not the cheapest, but uses premium components, has a large 25,000 mAh (90 Wh) capacity and is able to fast charge anything from a phone to a laptop at up to 100W.

Read more below

Best budget

INIU B6

Best budget power bank

With 20W fast charge capability and a 10,000 mAh (37 Wh) capacity, the INIU B6 is the perfect low-cost power bank to slip into a pocket. It gives standout efficiency, has a number of unique features, and is backed by a leading three-year warranty.

Read more below

Best Premium

Anker 737 (PowerCore 24K)

Best laptop fast charging

A premium power bank from a premium brand, that can output up to 140W (28V, 5A) to give the fastest charging speeds for your high-end MacBook Pro or other laptop. With multiple USB ports and a large 24,000 mAh (86.4 Wh) capacity, it’s also great for travel.

Read more below

Best small 140W

Ugreen 145W

Best compact high power and capacity

The Ugreen power bank is more compact than comparable models from competing brands, but still offers a large 25,000 mAh (90 Wh) capacity and up to a high end 140W (28V, 5A) output. While premium, the power bank is usually sold at an affordable price, and is a great option for phone or laptop charging.

Read more below

Best form factor

Baseus Blade Pro

Best slim but powerful

Measuring just 2cm thick, the 20,000 mAh (74 Wh) Blade Pro is perfect for slipping into a laptop bag where other power banks are too thick or the wrong shape. It’s also capable of fast charging at up to 100W, has a detailed display and supports pass-through charging.

Read more below

Best Compact

4Smarts 45W

Best compact 10K

Not only is the 4Smarts power bank the most compact we have tested for its 10,000 mAh (37 Wh) capacity, it has a 45W output that is ideal for very fast-charging phones. The little power bank also has dual USB-C ports, and does pass-through charging at 27W.

Read more below

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Best budget 20K

VRURC T2055

Best affordable medium capacity

This power bank is a great option as an affordable all-rounder for getting a phone or tablet charged when on the go. It has a high-efficiency large 20,000 mAh (74 Wh ) capacity and can fast charge at up to 20W. It’s also quite compact and offers great bang for buck.

Read more below

Best 30W charging

Romoss Sense 4S Pro

Best affordable fast charging

This little 10,000 mAh power bank can output 30W, which means it can top up your phone significantly faster than 20W models. Even better, it has one of the best efficiencies we tested, and can even give an emergency boost to a laptop.

Read more below

Best magnetic wireless

Ugreen Magnetic Wireless

Best MagSafe compatible

Ready to give up to 15W of Qi wireless charging, the Ugreen power bank works with any MagSafe compatible phone or accessory – not just iPhones. The 10,000 mAh (37 Wh) power bank also does 20W wired fast charging via USB-C, and has excellent efficiency.

Read more below

Best 65W power bank

INIU B62

Best 65W power bank

The INIU B62 is a great option for those who need a higher 20,000 mAh capacity and 65W output, but still want an affordable price tag. The B62 power bank well suited to charging everything from a phone, through to a portable gaming device or even a laptop. Even better, it supports Samsung Super Fast Charge 2.0 up to 45W.

Read more below

The best power bank of 2025 in Australia

Why you can trust TechRadar We spend hours testing every product or service we review, so you can be sure you’re buying the best. Find out more about how we test.

Below you'll find full write-ups for each of the best power banks in our list. We've tested each one extensively so you can be sure that our recommendations can be trusted.

The best power bank overall

Image 1 of 5

ZMI No.20 (QB826G) 25K 100W power bank — (Image credit: TechRadar)

1. ZMI No.20 (QB826G)

The best power bank you can buy in Australia

Specifications

Capacity: 25,000 mAh (90.75 Wh)

Total Wattage: 210W

Single Port Wattage: 100W

Number of Ports: 3

USB-C: 2x in/out ports

USB-A: 1 port

Dimensions: 18.8 x 8.1 x 2.8cm

Weight: 580g

Phone Charges: 3 to 5 times

Reasons to buy

High capacity

Laptop charging

Premium quality

Reasons to avoid

On the larger side

Limited buying options

Scratches easily

Buy it if

✅ You need to fast charge a laptop: The 100W USB-C output is perfect for power-hungry devices.

✅ You need a large capacity power bank: The No.20 has a large 25,000 mAh capacity.

✅ You use your power bank a lot: The quality components in the No.20 make it ideal for heavy use.

Don't buy it if:

❌ You need a pocket size power bank: The No.20 is on the larger size and best suited for slipping into a bag.

❌ You want a detailed display: The No.20 tells you the remaining capacity, but doesn’t show extra details like
output wattage.

Featuring a large 25,000 mAh (90 Wh) capacity and a high 100W single port output, the ZMI No.20 is perfect for meeting your varied on-the-go charging needs. The power bank has two USB-C input / outputs – the first USB-C port outputs or charges at 100W (20V, 5A), while the second is limited to 45W (20V, 2.25A) in or out. The third port is USB-A and can also do up to 100W (20V, 5A) for PD spec devices like laptops, but only with the included ZMI USB-A to USB-C cable. All up you can pull 210W, which means there is no issue fast charging one or more laptops, phones or other devices at the same time.

The No.20 also supports pass-through charging and UPS mode, and has a low current device charging mode. Remaining capacity is shown with a simple light-up percentage display that's easy to read in the sun but a bit bright at night. The plastic build means it’s not too heavy at 580 grams, and while 18.8cm long and 8.1cm wide, the 2.7cm thickness and curved edged makes it easy to slip into a bag. The power bank is quite robust if dropped, but the shiny finish will scratch fairly easily.

In testing, the No.20 could output 87.9% of its capacity at 20V, and 84.9% at 9V, which is an above-average efficiency. Using the two USB-C ports, the ZMI will happily sustain 100W or 100W+45W output without overheating, and runs cool enough to be left in a bag for slower laptop or phone charging. Importantly, the two USB-C ports are 100% independent, which means one won’t disconnect and renegotiate power levels if a new device is plugged into the other USB-C port. Using a 100W charger, the No.20 takes 1.5 hours to recharge, or around 2.5 hours if using the 45W input.

The 210W rating is 20V, 10.5A total using both the first USB-C port and the USB-A port with the ZMI cable. Connecting two 100W laptops works fine because while power use peaks near 200W, the average power use is much lower. UPS mode works well, but it only applies to the USB-C ports (or USB-A at under 12V) so is limited to either 45W output and 100W charging, or 45W charging and up to 100W output. While not overly compact for its capacity, the ZMI isn’t too large either. The ZMI uses high-quality Samsung 21700 cells (INR21700-50E), so is ideal for long-term heavy use.

Swipe to scroll horizontally

Test	Usable Capacity	Efficiency	Score
10W (5V, 2A)	75.3 Wh	85%	4 / 5
20W (9V, 2.22A)	76.2 Wh	86%	4 / 5
100W (20V, 5A)	78.2 Wh	88%	4 / 5

^ Back to the top

The best budget power bank

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INIU B6 10K 20W Power Bank — (Image credit: TechRadar)

2. INIU B6

Best power bank for tight budgets

Specifications

Capacity: 10,000 mAh (37 Wh)

Total Wattage: 20W

Single Port Wattage: 20W

Number of Ports: 3

USB-C: 1x in/out

USB-A: 1 port

Dimensions: 13.6 x 7 x 1.5cm

Weight: 210g

Phone Charges: 1 to 2 times

Reasons to buy

Slim and lightweight

Efficient 20W fast charge

Built-in stand and torch

Reasons to avoid

Easily scratched

Buy it if

✅ You need an affordable power bank: The B6 offers great specs considering the bargain price.

✅ You plan to charge a phone: The 10,000mAh capacity and 20W output is perfect for topping up on the go.

Don't buy it if:

❌ You want to charge a laptop: While great for phones, tablets and other handheld devices, a higher output power bank is needed for laptops.

❌ You charge heavily every day: The B6 has a great three-year warranty, but those looking to drain it every day should consider a premium power bank.

The INIU B6 offers a lot considering the affordable price tag, with a 10,000 mAh (37 Wh) capacity and a 20W (9V, 2.22A) PD 3.0 output, which will fast charge most phones between 1-2 times. The B6 measures in at 13.6 x 7 x 1.5cm, and weighs 210 grams, which is better than average size vs capacity, making it ideal for slipping into a pocket, purse or bag.

The B6 has a single USB-C port, as well as two USB-A ports and a large easy-to-read capacity display. In the box you get a USB-A to USB-C cable and a carry bag – the latter is handy as the soft-touch coating on the B6 is great to hold but prone to scratches. The soft-touch coating also holds fingerprints and fluff and we do worry if it will go sticky in a few years. The power bank has a useful torch built in – but it's not very bright – and it can be turned on by double pressing the power button. The B6 also has a pull-out phone holder to turn the power bank into a stand when charging.

The B6 has excellent voltage accuracy and can output 85% of its rated capacity at 20W (9V, 2.22A) and an even better 91% at 5V. These are very impressive results considering the affordable price. The B6 also supports PPS mode from 5V to 11V, at 2A, and 5V to 5.9V at 3A, which allows compatible phones to charge faster and more efficiently. We have given our test B6 extended cyclic testing with no appreciable capacity loss, but it’s worth noting INIU offers a generous three-year warranty.

For those who like the look of the B6 but need a larger capacity, the