Best Power Banks in 2026: How to Choose the Right Portable Charger

 

The Best Power Bank Isn't Necessarily the Biggest One

A power bank sounds like a simple gadget.

Buy one with a large battery, put it in your bag and use it whenever your phone runs out of power.

But choosing the right model in 2026 is more complicated.

Today's power banks can offer:

• USB-C Power Delivery
• High-wattage laptop charging
• Multiple charging ports
• Built-in USB-C cables
• Digital displays
• Wireless charging
• Qi2 magnetic charging
• Pass-through charging
• Fast self-recharging
• Battery capacities ranging from compact 5,000mAh models to much larger portable power stations

And bigger doesn't always mean better.

A 25,000mAh power bank can provide considerably more stored energy than a compact 5,000mAh model, but it can also be much heavier.

For someone commuting to work, that extra weight may not be worthwhile.

For a traveler working from a laptop, however, the additional capacity could be extremely useful.

So the best power bank is the one that matches your devices, your daily routine, and your travel needs.

 

What Is a Power Bank?

A power bank is a portable rechargeable battery designed to provide power to another device.

Most modern models contain lithium-ion or lithium-polymer battery cells, charging circuitry, and one or more output ports.

Depending on the model, a power bank can charge:

• Smartphones
• Tablets
• Wireless earbuds
• Smartwatches
• Handheld gaming devices
• Cameras
• Laptops
• Other USB-powered electronics

Modern high-output models can effectively function as portable laptop chargers rather than merely emergency phone batteries.

Tom's Guide's current 2026 testing includes power banks ranging from compact models to the 40,000mAh CUKTECH 30, which it identifies as a high-capacity portable charger capable of up to 140W output.

 

How We Look at Power Banks at Fair Square Tech

A power bank shouldn't be judged by capacity alone.

For our buying guides, we look at several factors:

Capacity

How much energy can it store?

Output

How quickly can it charge your device?

Ports

How many devices can you charge simultaneously?

Size and weight

Will you actually want to carry it?

Compatibility

Does it work properly with your phone, tablet or laptop?

Charging technology

Does it support USB-C PD, PPS, Qi2 or other relevant standards?

Travel practicality

Can you legally and conveniently take it on a flight?

Safety

Does it include appropriate protection and come from a reputable manufacturer?

Real-world performance

What do independent testers actually find?

This is important because manufacturer specifications tell only part of the story.

 

How Much Capacity Do You Need?

Power-bank capacity is commonly advertised in milliamp-hours, or mAh.

You will commonly see:

• 5,000mAh
• 10,000mAh
• 20,000mAh
• 25,000mAh
• 27,000mAh
• 30,000mAh
• 40,000mAh

But mAh alone doesn't tell you exactly how much usable energy your devices will receive.

Power banks experience energy losses during voltage conversion and charging.

For this reason, the number of charges you actually get will be lower than a simple comparison of the power bank's mAh rating against your phone's battery capacity.

Anker, for example, says its 25,000mAh model can deliver considerably less than its nominal capacity after conversion losses.

 

5,000mAh Power Banks

A 5,000mAh model is designed primarily for portability.

It can make sense if you:

• Want emergency phone power
• Carry a small bag
• Don't want much additional weight
• Usually have access to wall outlets

The major advantage is convenience.

The disadvantage is limited capacity.

A compact 5,000mAh power bank isn't designed to keep several devices running for days.

 

10,000mAh Power Banks

For many smartphone users, 10,000mAh is a practical middle ground.

It offers substantially more capacity without becoming as bulky as many larger models.

A 10,000mAh power bank can be useful for:

• Daily commuting
• Travel days
• Long events
• Outdoor activities
• Emergency backup

It is also a common capacity for magnetic and Qi2 power banks.

WIRED's current October 2026 power-bank guide includes the Anker MagGo Power Bank (10K) among its recommended portable chargers.

 

20,000mAh Power Banks

20,000mAh models make more sense when you want several charging cycles or need to power multiple devices.

They can be useful for:

• Travelers
• Remote workers
• Content creators
• Students
• Photographers
• People who spend long periods away from outlets

The trade-off is obvious:

More capacity usually means more weight and size.

 

25,000mAh and Larger Power Banks

Larger power banks are increasingly capable of charging laptops.

For example, Anker's current 25,000mAh power bank provides up to 165W total output and up to 100W through individual USB-C outputs, depending on how the ports are being used.

UGREEN also offers a 25,000mAh model rated for up to 165W total output, with built-in USB-C cables and support for multiple devices.

These are powerful portable chargers, but they are not small.

The right question is:

Do you actually need that much power?

 

Power Bank Capacity vs Charging Power

Capacity and charging power are different.

Capacity

Usually expressed in mAh or Wh.

It tells you how much energy the power bank stores.

Charging power

Usually expressed in watts.

It tells you how quickly it can potentially deliver power.

A 20,000mAh power bank could have relatively modest output.

Another 20,000mAh model could support much higher USB-C power.

Therefore, don't compare power banks using capacity alone.

 

Why Wattage Matters

If you're charging a smartphone, moderate output may be sufficient.

If you're charging a laptop, output becomes much more important.

For example:

• 20W can be appropriate for many phones.
• 30W–45W can be useful for phones and tablets.
• 65W can be useful for many laptops.
• 100W can support more demanding laptops.
• 140W or higher can target certain high-performance devices.

But your device must support the relevant charging standard and power level.

A 165W power bank doesn't automatically make every phone charge at 165W.

 

USB-C Is Now the Most Important Port

If you're buying a new power bank in 2026, USB-C should be high on your checklist.

USB-C can support:

• Charging
• High-power USB Power Delivery
• Data transfer
• Device compatibility across many modern products

But remember the lesson from Article #24:

USB-C is a connector, not a guarantee of performance.

Different USB-C ports and cables can have different capabilities.

 

What Is USB Power Delivery?

USB Power Delivery, or USB PD, allows compatible devices and chargers to negotiate appropriate power levels.

This is particularly important for laptops and modern smartphones.

A power bank capable of USB PD can potentially provide substantially more power than basic USB charging.

The actual charging rate depends on:

• The power bank
• The cable
• The device
• The charging protocol
• The battery's current condition
• Thermal conditions

 

What Is PPS?

PPS stands for Programmable Power Supply.

It is an extension associated with USB Power Delivery that allows more flexible voltage and current adjustment.

PPS can be particularly relevant for compatible smartphones that use it as part of their fast-charging systems.

If your phone specifically requires or benefits from PPS, check that the power bank supports it.

Don't assume that every USB-C PD power bank provides identical fast charging across all phones.

 

Do You Need a 100W Power Bank?

Not necessarily.

If you only charge:

• Smartphone
• Earbuds
• Smartwatch

then 100W may be unnecessary.

But if you want one power bank for:

• Laptop
• Phone
• Tablet
• Gaming handheld

a high-output USB-C power bank becomes much more attractive.

The important thing is to match the power bank to the most demanding device you actually use.

 

Power Banks for Laptops

Laptop users should look beyond capacity.

Check:

1. USB-C output

Does it provide enough wattage?

2. Charging protocol

Does your laptop accept USB PD?

3. Cable

Is the cable rated for the required power?

4. Capacity

Will the power bank provide meaningful additional runtime?

5. Weight

Are you willing to carry it?

A high-capacity laptop power bank can become surprisingly heavy.

 

Example: Anker 25K 165W

One current example is the Anker Power Bank 25K, 165W, with built-in and retractable cables.

According to Anker, it provides:

• 25,000mAh capacity
• 165W maximum total output
• Up to 100W from compatible USB-C outputs
• Three USB-C connections
• One USB-A output
• Built-in/retractable USB-C cables
• Digital display
• 595g weight
• 90Wh rated energy
• USB PD/PPS support

Anker also specifies that power is dynamically distributed when multiple ports are used, meaning the headline 165W figure should not be interpreted as 165W simultaneously available from every port.

This is exactly why Fair Square Tech recommends reading the power distribution specifications, not just the headline wattage.

 

Example: UGREEN Nexode 25,000mAh 165W

UGREEN's current Nexode power bank is another high-capacity example.

The company lists:

• 25,000mAh capacity
• 165W total output
• Built-in USB-C cables
• Multiple charging ports
• 140W and 65W cable outputs
• USB PD 3.1
• PPS
• Digital battery display

UGREEN also markets the model for simultaneous charging of multiple devices, including laptops.

Again, the exact power allocation depends on how many devices are connected.

 

What About 40,000mAh Power Banks?

Huge power banks exist.

Tom's Guide currently lists the CUKTECH 30 Power Bank as its top overall portable charger in its September 2026 guide.

The model has:

• 40,000mAh capacity
• Up to 140W output
• Two USB-C ports
• Two USB-A ports
• 20W wireless charging
• Approximately 2.5-pound weight

Tom's Guide describes it as a middle ground between a conventional portable power bank and a small power station.

That makes it interesting for users with demanding portable power needs.

But at roughly 2.5 pounds, it is not something everyone will want in a daily backpack.

 

The Weight Problem

This is where many power-bank buying guides go wrong.

They emphasize capacity.

But you actually have to carry the thing.

Consider two users.

User A

Carries an iPhone or Android phone to work.

A 10,000mAh power bank may be enough.

User B

Works remotely from cafés and travels with a laptop.

A 20,000mAh or 25,000mAh high-output model could make much more sense.

User C

Needs to keep several devices running for long periods away from electricity.

A much larger model may be justified.

The best power bank depends on the situation.

 

Wireless and Qi2 Power Banks

Wireless power banks have become more interesting with the growth of Qi2.

Instead of plugging in a cable, compatible devices can attach magnetically or charge wirelessly using supported standards.

This is particularly convenient for compatible smartphones.

WIRED's October 2026 guide includes the Anker MagGo Power Bank (10K) among its recommended Qi2/MagSafe-oriented portable chargers.

 

Wireless Charging Has Trade-Offs

Wireless charging is convenient.

But wired charging can still be more efficient and versatile.

Wireless charging can also introduce additional heat.

So a wireless power bank makes the most sense when convenience is important.

If maximum charging efficiency and speed are your priorities, a wired USB-C connection may be preferable.

 

Should You Buy a Magnetic Power Bank?

A magnetic power bank can be convenient if your phone supports compatible magnetic alignment.

It can be useful for:

• Walking
• Travel
• Commuting
• Navigation
• Emergency charging
• Minimal-cable setups

But check compatibility carefully.

Magnetic attachment and wireless charging capabilities vary by phone and case.

 

Built-In Cables: Useful or Gimmick?

Some modern power banks include built-in cables.

This can be extremely convenient.

You don't have to remember to carry a separate cable.

Anker's current 25K 165W model, for example, includes built-in and retractable USB-C cables.

UGREEN also offers a 25,000mAh model with integrated USB-C cables.

Advantages

• Less clutter
• Fewer accessories
• Convenient for travel
• Harder to forget the cable

Disadvantages

• Cable can eventually wear out
• Less flexibility if you need a different connector
• Integrated cables can contribute to device size

For frequent travelers, however, the convenience can be worthwhile.

 

Digital Displays

Some power banks include a small display showing:

• Remaining battery percentage
• Charging status
• Output
• Input
• Estimated charging information

This can be useful.

A percentage display is generally more informative than four simple LED dots.

But don't pay a large premium simply for a screen.

 

Pass-Through Charging

Some power banks support pass-through charging.

This means the power bank can receive power while also supplying power to another device.

It sounds useful, but it isn't always appropriate for every battery system.

Check the manufacturer's documentation before assuming pass-through charging is recommended for long-term use.

Anker's current 25K 165W model lists pass-through charging as supported.

 

Power Banks and Air Travel

This is one of the most important things to understand before traveling.

Power banks contain lithium batteries, so airlines regulate them.

The FAA currently states that spare lithium-ion batteries and power banks must be carried in carry-on baggage, not checked baggage. The FAA generally allows batteries up to 100Wh, while larger 101–160Wh spare batteries require airline approval and are limited to two. Batteries exceeding 160Wh are not permitted on passenger aircraft.

IATA's 2026 passenger guidance also notes that airlines may impose stricter restrictions and advises passengers to keep power banks in the cabin rather than checked baggage.

The important lesson:

Check your airline's current rules before flying.

Airline policies can be stricter than general regulatory guidance.

 

Why 100Wh Matters

Many travelers know power banks by mAh.

Airlines often use watt-hours, or Wh.

You can estimate watt-hours with:

Wh = mAh ÷ 1,000 × voltage

For example, a 25,000mAh battery rated at approximately 3.6V corresponds to around:

90Wh

That is why many large consumer power banks remain below the 100Wh threshold.

Anker lists its 25,000mAh model at 90Wh.

Always use the manufacturer's stated Wh rating when available rather than relying solely on an estimate.

 

Never Put a Power Bank in Checked Baggage

This deserves its own section.

Power banks are spare lithium batteries.

The FAA states that spare lithium batteries, including power banks, must not be placed in checked baggage.

Keep them with you in the cabin.

If your carry-on bag is taken at the gate and placed in the aircraft's hold, remove the power bank and keep it with you.

 

Don't Travel With a Damaged Power Bank

Don't use or travel with a power bank that is:

• Swollen
• Cracked
• Overheating
• Leaking
• Physically damaged
• Recalled

The FAA warns that damaged or recalled lithium batteries can present serious fire hazards and should not be carried aboard aircraft unless appropriately made safe.

If a battery begins smoking, swelling or becoming unusually hot, move away from it and seek appropriate assistance.

 

How Many Times Can a Power Bank Charge Your Phone?

There isn't one universal answer.

A rough estimate requires considering:

• Power-bank energy
• Phone battery capacity
• Voltage conversion
• Charging losses
• Heat
• Device usage while charging

For example, a 10,000mAh power bank does not necessarily deliver exactly two complete charges to a phone with a 5,000mAh battery.

Energy is lost during conversion and charging.

That's why manufacturer claims should be treated as estimates rather than guarantees.

 

Why Your Power Bank May Not Deliver Its Full Capacity

This is normal.

A power bank stores energy internally at one voltage, while your device's battery uses another voltage.

The power bank's electronics convert the energy.

Conversion isn't perfectly efficient.

Additional losses can come from:

• Heat
• Cable resistance
• Charging circuitry
• Device power consumption
• Battery-management systems

So the usable output is lower than the headline capacity.

 

Power Bank Safety

Good power banks should incorporate multiple layers of protection.

Depending on the model, these may include protection against:

• Overcharging
• Overcurrent
• Overvoltage
• Short circuits
• Excess temperature

Anker, for example, says its current 25K 165W model uses its ActiveShield 2.0 protection system and monitors temperature during operation.

This doesn't mean every product from every manufacturer uses the same technology.

That's why choosing a reputable manufacturer matters.

 

Don't Buy Based on Capacity Alone

Imagine two power banks.

Power Bank A

25,000mAh
20W output
Heavy
Basic ports

Power Bank B

20,000mAh
100W USB-C PD
Lighter
Better port selection

Which is better?

There isn't a universal answer.

If you're charging only a phone, Power Bank A may provide enough capacity.

If you're powering a laptop, Power Bank B could be considerably more useful.

Your workload determines the better choice.

 

What Power Bank Should You Buy?

Best for Everyday Phone Backup

Look for:

• 5,000–10,000mAh
• USB-C
• Around 20W or higher output
• Compact design

 

Best for Travel

Look for:

• Around 10,000–20,000mAh
• USB-C PD
• Compact construction
• Clear battery indicator
• Airline-friendly Wh rating

 

Best for Laptop Users

Look for:

• 20,000–27,000mAh
• USB-C PD
• 65W–140W output depending on laptop
• High-power cable
• Good thermal protection

 

Best for Multiple Devices

Look for:

• 20,000mAh or higher
• Multiple USB-C ports
• High total output
• Intelligent power distribution
• Clear display

 

Best for Wireless Convenience

Look for:

• Qi2 compatibility where appropriate
• Magnetic alignment
• USB-C wired charging
• Compact design

 

Current Power Banks Worth Watching in 2026

Rather than declaring one universal winner, here are several models worth researching for different needs.

Anker Power Bank 25K 165W

Best suited to users who want high output, multiple USB-C connections, and laptop capability.

Anker lists 25,000mAh capacity, 165W maximum total output, 100W USB-C output capability, and built-in/retractable cables.

UGREEN Nexode 25,000mAh 165W

A high-output option with built-in USB-C cables and support for multiple charging protocols.

CUKTECH 30

A much larger 40,000mAh model aimed at users who prioritize capacity and high output over portability. Tom's Guide currently names it its best overall portable charger in its 2026 guide.

Anker MagGo Power Bank 10K

A compact Qi2/MagSafe-oriented option for users who prioritize wireless convenience. WIRED currently includes it among its recommended power banks.

These aren't presented as Fair Square Tech hands-on rankings. They are examples identified through current manufacturer information and independent buying guides.

 

What About Cheap Power Banks?

Cheap doesn't automatically mean bad.

But extremely low-cost power banks deserve more scrutiny.

Check:

• Manufacturer identity
• Capacity claims
• Output specifications
• Safety protections
• Warranty
• Certification
• Reviews from credible testers

Tom's Guide tested five inexpensive power banks in 2026 and found meaningful differences among low-cost options, illustrating why price alone isn't enough to determine quality.

 

Common Power Bank Buying Mistakes

Mistake 1: Buying the biggest capacity

More capacity also means more weight.

 

Mistake 2: Looking only at mAh

Output wattage matters too.

 

Mistake 3: Ignoring USB-C PD

This can limit charging performance, particularly with laptops.

 

Mistake 4: Forgetting the cable

A high-output power bank needs a suitable cable for high-power charging.

 

Mistake 5: Assuming 100W means every device gets 100W

The device determines how much power it can accept.

 

Mistake 6: Ignoring multi-port power distribution

A power bank's headline total output may be shared among several ports.

Anker's 165W model, for example, has different output allocations depending on how many ports are being used.

 

Mistake 7: Ignoring weight

A huge power bank can become annoying to carry.

 

Mistake 8: Packing it in checked luggage

Power banks must remain with passengers in the cabin under FAA guidance.

 

Mistake 9: Buying a damaged battery

A swollen or damaged power bank should not be treated as normal equipment.

 

Power Bank Buying Checklist

Before purchasing, ask:

Capacity

• How many devices do I need to charge?
• How long will I be away from an outlet?

Output

• What wattage does my phone require?
• What wattage does my laptop require?

Ports

• Do I need multiple USB-C ports?
• Do I still need USB-A?

Wireless

• Do I need Qi2?
• Does my phone support compatible magnetic charging?

Size

• Am I willing to carry a large power bank?

Travel

• What is its Wh rating?
• Does my airline have additional restrictions?

Safety

• Does the manufacturer provide clear specifications?
• Does the product have appropriate safety protections?

Long-term use

• Is the power bank compatible with devices I may buy in the future?

 

Our Fair Square Tech Recommendation

For most smartphone users, a 10,000mAh USB-C power bank is a sensible starting point.

It offers a useful balance between capacity and portability.

For frequent travelers or people who need more than emergency phone charging, 20,000mAh becomes more attractive.

For laptop users, look beyond capacity and focus heavily on USB-C Power Delivery output.

And for people who want to charge multiple high-power devices, 25,000mAh-class power banks with 100W-or-higher USB-C output can be compelling—but their weight and size should be considered carefully.

The biggest power bank isn't automatically the best.

The best power bank is the one you'll actually carry and that can provide enough power for your devices.

 

Final Thoughts

Power banks have evolved from simple emergency phone batteries into sophisticated portable power systems.

In 2026, you can find models designed specifically for:

• Smartphones
• Tablets
• Laptops
• Gaming handhelds
• Travel
• Wireless charging
• Multi-device setups

Current products can reach 165W of total output, while larger models can offer 40,000mAh of capacity.

But bigger numbers don't automatically mean a better product.

A good buying decision comes down to five things:

Capacity.

Output.

Compatibility.

Portability.

Safety.

And if you're traveling by air, add one more:

Watt-hour rating and airline rules.

The goal isn't to own the most powerful power bank.

The goal is to have enough portable power without carrying unnecessary weight or spending money on features you don't need.

That's the Fair Square Tech approach: understand the technology first, then buy according to your real needs.

 

Frequently Asked Questions

What is the best power bank in 2026?

There isn't one universal best power bank.

A compact 10,000mAh model may be better for everyday phone users, while a 20,000mAh or 25,000mAh high-output model may be more appropriate for travelers and laptop users.

Current independent guides recommend different models for different use cases rather than treating capacity as the only deciding factor.

 

Is 10,000mAh enough for a phone?

For many users, yes.

It provides a useful amount of backup capacity while remaining relatively portable.

The exact number of charges depends on the phone, conversion losses and how the phone is used while charging.

 

Is 20,000mAh better than 10,000mAh?

Not automatically.

20,000mAh provides more stored energy, but it is generally larger and heavier.

Choose based on how long you need to stay away from an outlet.

 

Can a power bank charge a laptop?

Yes, if the power bank and laptop support compatible USB-C charging and the power bank can provide sufficient output.

For many laptops, 65W or higher may be useful, but check the laptop's specifications.

 

Is a 100W power bank better than a 20W power bank?

Only if you need the additional power.

A 100W-capable power bank can be more useful for laptops and demanding devices.

For a phone-only user, the additional output may not be necessary.

 

Is Qi2 worth it on a power bank?

Qi2 can be worthwhile if you have a compatible phone and value convenient magnetic wireless charging.

If maximum charging efficiency is your priority, wired USB-C charging remains important.

 

Can I bring a power bank on an airplane?

Generally, power banks must be carried in your cabin/carry-on baggage rather than checked baggage.

The FAA generally permits spare lithium-ion batteries up to 100Wh, with additional requirements for larger batteries, while airlines can impose stricter limits.

Always check your airline's current policy before traveling.

 

Is 25,000mAh allowed on a plane?

Capacity in mAh alone doesn't determine airline eligibility.

You need to look at the battery's watt-hour rating.

For example, Anker lists its 25,000mAh 165W power bank at 90Wh.

However, airline rules can change, so check the current requirements of your carrier.

 

Why does my power bank provide fewer charges than expected?

Energy is lost during voltage conversion and charging.

The advertised mAh capacity is not equivalent to the exact amount of energy that will reach your phone's battery.

 

Can I charge multiple devices at once?

Many power banks support multiple devices.

However, total power is often shared between ports.

Always check the manufacturer's power-distribution table rather than assuming each port provides the maximum output simultaneously.

 

How long does a power bank last?

The useful life depends on battery chemistry, charging cycles, heat, usage and build quality.

Like other rechargeable batteries, capacity can decline over time.

Avoid exposing power banks to excessive heat and replace any unit that becomes swollen or physically damaged.

 

Research Sources

This article was researched using current 2026 information from:

• Tom's Guide — current power-bank testing and buying guide, updated September 16, 2026.
• WIRED — current October 2026 power-bank recommendations and testing.
• Anker official specifications — current 25,000mAh/165W power bank specifications, charging distribution, capacity and safety information.
• UGREEN official specifications — current 25,000mAh/165W Nexode power bank specifications.
• Federal Aviation Administration (FAA) — current passenger guidance for lithium batteries and power banks.
• International Air Transport Association (IATA) — 2026 passenger guidance concerning lithium batteries and power banks.
• Versus.com — used as a reference for relevant product specifications and comparison attributes, consistent with the Fair Square Tech research workflow.

Research checked: October 6, 2026

Fair Square Tech editorial note: Power-bank specifications, charging protocols, prices, availability, and airline policies can change. The products mentioned are examples from current research, not claims of Fair Square Tech hands-on testing. Independent test results are attributed to their respective publications, while manufacturer specifications are identified as manufacturer-provided information.