The best power banks 2024: the top portable chargers from Anker, Otterbox, and more

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Best Power Banks banner showing Anker Prime 27K Power Bank
(Image credit: Future)

A great power bank is more than just a battery, it's peace of mind. Finding the right power bank can be hard because there are so many options available, especially at the big retail store and sites. We're going to make it very easy to find a great, affordable power bank to keep you going all day long, and maybe even days longer. 

Frankly, there is one company that is making the best power banks by far, and that is Anker. Anker invested heavily in so-called GaN (gallium nitride) charging technology that makes chargers and even batteries thinner and more power efficient. 

Anker also produces batteries and chargers that are simply higher quality than anything else you'll find. Its power banks include cool features and display screens that give you more information about your devices, and its USB-C ports charge at the highest speed the iPhone 15 and most of the best phones can handle. 

We've only included wired power banks on this list that can charge at newer speeds, though wireless charging is more about convenience than speed, so some of our wireless power bank favorites are still a bit slow on the charge. 

Even if you don't have an Apple iPhone, don't shy away from MagSafe-compatible battery packs. There are MagSafe-friendly cases for most phones from Samsung, Google, and more, and those will let you use MagSafe batteries for charging and other MagSafe accessories. 

We've tested every power bank in this list, and many more, in order to bring you the best options. Below, you'll find everything from the very small to the very large; from the wired to the wireless; from innovative bricks to forms you wouldn't expect. Read on for our favorites.

The quick list

Want the simplest guide to the best power banks around? Here's our quick guide – and you can read more in-depth verdicts on each power bank by following the links. 

The best power bank 2024

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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 for everything

1. Anker 733 Power Bank (GaNPrime PowerCore 65W)

The best power bank for charging everything, at home or on the go

Specifications

Capacity: 10,000mAh
Total Wattage: 65W
Number of Ports: 3
USB-C: 2 ports
USB-A: 1 port
Weight: 320g
Power-to-weight: 31.3mAh/g

Reasons to buy

+
Fast charging and battery in one
+
Power for a laptop and smartphone
+
Super convenient all-in-one design

Reasons to avoid

-
A bit heavy and cumbersome
-
Has trouble staying in an outlet 
-
More powerful plugged than unplugged
BUY IT IF

You travel a lot and need power: We never take flight without the Anker 733 in our carry on luggage. It replaces multiple wall chargers and gives us a large battery on the go. 

You carry a small laptop and a phone: The Anker 733 is powerful enough to charge a laptop and a phone together. Or you can charge your phone, headphones, and smartwatch all at once.

DON'T BUY IT IF

You want a more portable option: Because of its combo nature, the Anker 733 is a bit bulky and cumbersome, but if you use it both ways, it's worth the trade-off in size to have such a useful device.  

You only want to charge a phone: If you don't need to charge a laptop occasionally, or you only carry a phone with no accessories, the Anker 733 is more than you need. 

The Anker 733 is a revelation, and though it isn't the most powerful or feature packed power bank on this list, it is the best overall power bank to carry if you charge multiple devices, no matter what those devices might be. It can charge an iPhone 15 at full 20W speed, and it can even power a Chromebook or small laptop like a Macbook Air whether it's plugged into a wall or not. 

Speaking of that wall plug, it's the most useful feature ever on a power bank. Some power banks come with a built in USB-C cord, but this Anker comes with a two-prong power outlet plug. That makes it a wall charger as well as a power bank, and the utility can't be understated. 

You might think that adding a 65W wall charger to a power bank would add a lot of bulk. Well, you're right, the Anker 733 is big, and it's power-to-weight ratio isn't as high as the heavy hitters on this list. On the other hand, you can charge the battery and three devices in a wall, then simply remove the Anker 733 and keep charging those devices with the built-in battery.

The Anker 733 has a 10,000 mAh battery inside, which is just shy of enough power to charge an iPhone 15 to 100% twice. It can charge a big Galaxy S23 Ultra to 100% once, then lift the battery to around 30% again. 

There are two USB-C ports on the Anker 733, and both are capable of 65W charging when the power bank is plugged in to a wall outlet, or 30W when the battery is running the show. There's also a USB-A port for legacy devices. You can charge the Anker 733 by plugging it into the wall or you can plug in one of the USB-C ports to charge the battery. 

The best power bank for power users

2. Anker Prime 27,650mAh Power Bank (250W)

The best power bank for power users who geek out about power

Specifications

Capacity: 27,650 mAh
Total Wattage: 250W
Number of Ports: 3
USB-C: 2 ports
USB-A: 1 port
Weight: 667g
Power-to-weight: 41.4mAh/g

Reasons to buy

+
Display gives up-to-date charge info
+
Can charge a MacBook Pro
+
Charge an iPhone for a week (almost)

Reasons to avoid

-
Very big, obviously
-
No built-in cords or prongs 
-
Some availability issues
BUY IT IF

You want the absolute best power bank: It has an app to monitor charging details, enough power to drive a MacBook or two, and fast recharging using both USB-C ports. Truly an unmatched power bank. 

You need power for days and days: You could leave with your iPhone 15 on a Monday and use only this battery until you return on Friday. It has enough juice for days of charging, not hours. 

DON'T BUY IT IF

You don't need all those extras: The Anker Prime power bank is pricey, and if you don't care about monitoring charge Wattage or days of battery life, find another option.

You want a compact battery: The Anker Prime power bank has a very high power-to-weight ratio (PWR), but it's still the heaviest battery on this list. It's more than three times the weight of our bargain pick. 

The Anker Prime series of Power Banks, including the Anker Prime 27,650mAh Power Bank (250W) and the Anker Prime 20,000mAh Power Bank (200W), are for people who truly love to geek out on power banks. If you came looking for the absolute best power bank you can buy, this is the best we've tried. 

First, let's start with the raw power. The big Anker Prime can power a MacBook Pro or any big laptop: it's USB-C ports are capable of 140W of power individually, and the entire battery pack can crank out 250W divided between the two USB-C and one USB-A port. 

You can also charge the Anker Prime using both USB-C ports at the same time, for a combined recharging rate up to 170W. That means you can completely refill this whopping 27K mAh battery in under 40 minutes. I thankfully had an Anker 737 GaN Prime charger that was up to the task, and it's fun to see the percentage climb. 

Think this is an amazing power bank? We're just getting started. The Anker Prime power bank has a built-in display, and it's no cheap LCD, it's a sharp OLED that gives you detailed information about the power going out or coming into the power bank. If that's not enough, there's also an Anker app you can download that gives you even more information about the battery on your smartphone.

That app is essential because there's a Find My feature built into the battery. It doesn't work like an AirTag over UWB, it's only Bluetooth, but it's useful if you misplace your battery in your office (or you have multiple batteries, like I do). 

In terms of charging, this massive power bank can charge an iPhone 15 more than five times. It can charge a big Galaxy S23 Ultra's 5,000mAh battery three-and-a-half times. Best of all, it charges at the fastest speed available on most of your favorite phones (excluding Oppo/OnePlus's unusual SUPERVOOC battery). 

Is the Anker Prime worth the high price? That's hard to say, since the larger battery has suffered from some availability issues, though the smaller version packs most of the same features, including the same maximum 140W charging speed in each USB-C port. If you want the best and you love to know about the power your devices are drawing, the Anker Prime Power Bank is the one to buy. 

The best mini power bank

3. Anker Nano Power Bank (22.5W)

The best power bank for power users who geek out about power

Specifications

Capacity: 5,000 mAh
Total Wattage: 22.5W
Number of Ports: 1
USB-C: 1 port
USB-A: N/A
Weight: 100g
Power-to-weight: 50mAh/g

Reasons to buy

+
Very small and pocketable
+
Great accessory for new iPhone owners
+
Extra USB-C port to charge anything

Reasons to avoid

-
Not enough power for a full charge
-
Adds weight to the phone when attached 
-
Some availability issues
BUY IT IF

You just got a new iPhone and want the perfect accessory: What better way to celebrate having a USB-C port than buying a new power bank that uses it well.

You want a power bank that fits in a small pocket: The Anker Nano is the smallest power bank on our list, but it packs a big wallop for its small size, and that fold-down USB-C plug makes it easier to carry. 

DON'T BUY IT IF

You need to charge back up to 100%: The Anker Nano carries a respectable 5,000 mAh of battery life, but the power lost in charging means it can't get an iPhone 15 or Galaxy S23 back to full power in a single charge. 

You want to charge old stuff: We're not bothered by the lack of USB-A ports on this small charger, but if your watch or headphones requires it, every other charger on this list has on (including the water bottle charger). 

Everybody on our gift list who got a new iPhone is going to get an Anker Nano Power Bank (22.5W) this year. This cute little charger is perfectly sized to sit beneath your favorite smartphone, plugged into the USB-C port with a little plug that opens out or hides away for a sleek look. 

The Anker Nano is only 5,000mAh, but that doesn't mean it can fully charge a 5,000mAh phone battery like you'll find in the Galaxy S23 Ultra. Power banks are about 60-70% efficient, depending on the phone's technology, so this power bank is good for charging an iPhone 15 to nearly full, but that big Ultra will only get about 65% charge. 

That's just fine, because this power bank is the perfect pocket companion to keep you going through a busy day. If you need more power, you'll have to carry a bag to hold a big battery, but the Anker Nano gives you enough power for busy digital living, without added bulk.

In fact, this is the most efficient battery on our list, in terms of power-to-weight ratios. At only 100g, the Anker Nano is the smallest, but it still packs in plenty of power for that weight. You could buy six Nano power banks and have more power for less weight than buying the big Anker Prime. 

The Anker Nano used to be available in an Apple Lightning version, but those days are thankfully behind us. No matter what phone you are using, especially if you're enjoying the new iPhone 15, this is the power bank you should keep on you. 

The best MagSafe power bank

4. Baseus Magnetic Foldable Power Bank 20W 10000mAh

The best magnetic power bank for MagSafe and wireless charging

Specifications

Capacity: 10,000 mAh
Total Wattage: 20W
Number of Ports: 1
USB-C: 1 port
USB-A: N/A
Weight: 220g
Power-to-weight: 45.45mAh/g

Reasons to buy

+
Very strong magnet for MagSafe
+
Wireless charging works with any phone
+
Built-in stand is great for StandBy mode

Reasons to avoid

-
Glossy finish attracts fingerprints
-
Only one extra port for charging 
-
Slow charging, wired and wireless
BUY IT IF

You want a powerful magnetic charger: The Baseus Magnetic Foldable Power Bank is a high-capacity battery built onto a very strong magnet. It holds onto an iPhone tightly, even in landscape mode. 

You want a portable StandBy dock: If you have an iPhone 12 or newer running iOS 17, you can use the Baseus Magnetic Foldable as a dock for your iPhone in StandBy mode, giving you a cool desk clock with notifications or a digital photo frame. 

DON'T BUY IT IF

You don't have a magnetic phone: You don't need an iPhone to enjoy the magnetic charging, but you'll need a case that lines up your phone with Apple's MagSafe wireless configuration, or else your phone won't charge properly. 

You need to charge quickly: The Baseus Magnetic Foldable Power Bank is a strong magnet and a big battery, but it charges very slowly, whether wired or wireless. If you don't mind your iPhone wearing a backpack, that's not a problem. 

There are plenty of wireless power bank options on the market, but the Baseus Magnetic Foldable Power Bank impressed me with its incredibly strong magnet. I have the official Apple MagSafe battery pack, and it's magnetic attraction is much weaker than this Baseus power bank. While the Apple battery fell off my phone occasionally, the Baseus Magnetic power bank held tight with less worry. 

That means I could twist my phone sideways into landscape mode and use the Baseus power bank as a portable stand for Apple's new StandBy mode, which is one of my favorite features on iOS 17, and certainly the one I use the most often. 

The Baseus Magnetic power bank can't charge very quickly; the company says it can only charge an iPhone at 7.5W, which is half the wattage a MagSafe iPhone is capable of handling. That was not problem, because this is a power bank that can stick to your phone for a while, so speed won't be of the essence. 

For the price and performance, the slower charging speed is a fine trade off. The Baseus Magnetic Foldable power bank had the second highest power-to-weight ratio on our list, and Baseus chargers are potent and affordable, a good mix.

If you have more than just your smartphone to charge, the Baseus Magnetic power bank has a USB-C port as well, and it can charge up to 20W, which is faster than the magnetic charging, if you really need a speed boost. 

With 10,000 mAh inside, it can charge an iPhone 15 to 100% just short of twice. A Galaxy S23 Ultra will get back to 100% charge once with an extra 35% or so on top of that.

The best cheap power bank

5. Baseus Airpow Power Bank 20W 10000mAh

The best affordable power bank with all the features you need

Specifications

Capacity: 10,000 mAh
Total Wattage: 20W
Number of Ports: 3
USB-C: 1 port
USB-A: 1 port
micro-USB: 1 port
Weight: 245g
Power-to-weight: 40.82mAh/g

Reasons to buy

+
Charges an iPhone 15 at full speed
+
Plenty of battery for the price
+
USB-C, USB-A, and even micro-USB ports

Reasons to avoid

-
Too big for most pockets
-
No wires built-in or wireless charging 
-
Not the fastest charging speed
BUY IT IF

You need more power for less money: The Baseus Airpow power bank starts at $20 in the US and is on sale often, including Black Friday, so it's a real steal.

You need more than one USB port: Most batteries with this many USB ports cost much more, so having two USB-C and one USB-A port will help you charge everything you carry. 

DON'T BUY IT IF

You're trying to keep it simple: The Baseus Airpow doesn't have any built in wires or wireless charging, so you'll need to carry extras when it's time to power up.  

You want to charge fast: While the 20W charging is respectable and can keep up with the new iPhone 15 USB-C port, most Android phones can charge faster than that, so a faster battery pack would help. 

If you haven't heard of Baseus, the company makes a healthy lineup of affordable, well-designed battery packs that don't feel nearly as cheap as their prices would indicate. The most affordable of the bunch, the so-called Airpow Power Bank, starts at $20 in the US but is available on sale often, including a 25% Black Friday discount. 

With three USB ports, including a USB-C port capable of 20W charging and a USB-A port for legacy devices, this battery is surprisingly feature-packed for such an inexpensive power bank. 

The Airpow is not a small power bank, but Baseus makes efficient gear that doesn't take up too much space. It's power-to-weight ratio is on par with the best battery packs from Anker and others. At 245g (more than half a pound), it's bulky, and you'll need to carry extra wires, but it's sleek and nice looking enough to keep in a hand bag. 

With 10,000mAh of power inside, the Baseus Airpow can charge an iPhone 15 once to 100% then once again to nearly full. It can charge a Galaxy S23 Ultra to full once, then add another quarter of a charge.

It's not the fastest battery, but that's expected for this price range. While a flagship phone like the Galaxy S23 Ultra can accept a charging speed up to 45W, the Baseus Airpow can only hit 20W maximum. That's enough for the iPhone 15, though the iPhone 15 Pro has an unpublished charging speed in excess of 20W. 

If you need more, Baseus has plenty of options available in a range of capacity sizes with a variety of features. The options aren't quite as fast or polished as the best power banks from Anker, but the prices are better, and Baseus doesn't add more bulk for less bucks. 

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