Even though today's best iPhones and best Androids have better battery life than ever, you need one of the best power banks to keep your phone, tablet or even your laptop going all day. We've reviewed dozens of power banks, from the biggest names to the most affordable brands on Amazon, and we can recommend the best portable battery for your needs.
We test power banks for more than just their charging potential. We look at their durability and all of the features they include. We also compare power banks based on their power-to-weight ratio, which tells us how much battery life you get for the extra weight you're forced to carry.
We've got power banks for power users that give you detailed information about the devices you're charging, or simple magnetic power banks than smile while your iPhone charges. You can find power banks large and small, premium and inexpensive. We've even got a power bank that doubles as a water bottle - with wireless charging, of course.
We've put all the best power banks through rigorous testing, evaluating their charging ability and durability. If a power bank broke down during our tests, you won't find it on this list. You can trust our recommendations because we've used these power banks extensively, and we'll continue to test them until we find something better.
The quick list
Here's the best power banks you can buy, and no extra junk. We only recommend batteries that we have tested and reviewed – and you can read more in-depth details on each battery pack by following the links.
The best power bank for everything
The Anker 733 Power Bank is the one we never leave home without. It charges our phone and all of our accessories fast, and it's even powerful enough to charge a Chromebook or MacBook Air.
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The best magnetic charging
The Anker MagGo Power Bank (10K) can charge your iPhone or Android (with a compatible case) magnetically, and you can even set your phone sideways for Standby mode to use it like a desk clock. It looks great, packs plenty of power, and has a gorgeous display to check how much juice is in the box.
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The best power bank for phones and more
The Iniu PD 22.5w 20000mAh power bank is a compact battery pack with plenty of power, available for a great price. It won't charge as fast as some competitors, but it looks sleek and offers plenty of ports for older accessories.
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The best small power bank
If you need more power than the Anker Nano provides, this Iniu B61 10000mAh packs enough juice to charge an iPhone more than once, and it's small enough to slip into a front pocket without much bulge. It's also a great price for such a sleek little battery pack.
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The best laptop power bank
The Anker Laptop Power Bank is great for heavy users who need to charge a phone and a laptop. The two inbuilt cables, one of which doubles as a carrying strap, are hugely convenient features, as is the in-depth display info.
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The best magnetic stand power bank
The cutesy Ugreen Uno Magnetic Wireless Power Bank 10000mAh 15W delivers a full charge fast. Aside from the emoji-faced battery indicator, this MagSafe power bank is a good size and weight, as it's priced well. This is a great, whimsical option if you want a magnetic stand-up power bank.
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The best power bank for power users
The Anker Prime 250W power bank is serious overkill for most, but if you're a power geek who would love to know everything about the devices you're charging, it'll blow you away. It can also charge a laptop, phone, and more multiple times over.
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The best mini power bank
The Nano doesn't have enough juice to give you a full charge, but it makes up for that power with a pocketable size and super-convenient swing-out USB-C plug.
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The best MagSafe power bank
The Baseus stands out through its magnets – which were strong enough to easily hold an iPhone 15 Pro Max in landscape mode in our testing – while its kickstand makes it a great desktop alternative. This MagSafe power bank isn't fancy, but it's less expensive.
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The best cheap power bank
The Airpow may be the cheapest on this list, but it has plenty features and enough power to charge the biggest smartphone battery more than once. With a generous port selection too, it's a steal at around $20.
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The best Apple Watch power bank
Own both an iPhone and Apple Watch? The Otterbox 2-in-1 has a magnetic dock for your wearable, and also acts as a mini desk clock while the watch is charging. Very cute and convenient.
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The best power bank combo
If you carry a water bottle everywhere, and you also need a spare battery, why not carry both in one device? The Tylt Bottle has two USB ports and also charges wirelessly. Oh, and the bottle is fully insulated to keep your drinks cold.
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The best power bank 2025
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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
✅ 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.
❌ 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 magnetic power bank
✅ You want a premium MagSafe power bank: The Anker MagGo power bank looks and feels ultra premium. The display shows battery life as a percentage, which is obviously useful, and time remaining, so you know how much juice is left.
✅ You want a durable power bank: The Anker MagGo power bank feels sturdy and solid, with a strong magnet capable of holding onto an iPhone tightly. The flip stand even felt secure.
❌ You want a lighted battery: This isn’t a very light or thin power bank, so it may bulge in your pocket if you try to charge on the go.
❌ You have an Android: Unless your Android phone lines up perfectly with Apple's MagSafe magnets, skip this one and get a battery pack without magnets instead.
The Anker MagGo Power Bank (10K) is a versatile charging solution with a 10,000mAh capacity, capable of delivering 27W of wired power and 15W wirelessly. Its key feature is MagSafe compatibility, allowing it to magnetically attach to iPhones from the iPhone 12 series onwards for secure and efficient charging.
The strong magnetic hold supports both vertical and horizontal mounting, and despite the unpadded wireless zone, it didn't scratch my phone or power bank during my review period.
Adding to its functionality, the MagGo Power Bank incorporates a foldable stand, providing a stable platform for propping up your iPhone during charging or content viewing. This thoughtful design element enhances its usability beyond basic charging.
In our tests, the Anker MagGo Power Bank charged an iPhone 13 Pro from 50% to 100% in approximately two hours, suggesting a full charge in roughly four hours. This process depleted the power bank to 73%, so we figure it can deliver multiple phone charges.
A smart display provides useful information, showing the power bank's battery level and estimated remaining running time or charging time. However, this estimation tends to fluctuate, making it somewhat unreliable.
The MagGo Power Bank boasts a sleek and understated design with a robust build and premium materials, contributing to its overall durability. While it may be somewhat thick and heavy, its reliable charging performance and convenient smart readout make it a suitable travel companion. However, its size might make it less ideal for carrying in a pocket with an iPhone attached.
The best power bank for phones and more
✅ You want a big battery for less money: While some power banks offer slightly higher capacity, they often come with a significantly higher price tag for a marginal gain in charging power. This option strikes an excellent balance between cost and capacity.
✅ You want to charge a phone plus accessories: Equipped with USB-C and dual USB-A ports, the Iniu PD power bank provides simultaneous charging for multiple devices like phones, earbuds, and much more.
❌ You want to charge as fast as possible: Despite its 20000mAh capacity, the Iniu PD power bank has a maximum output of 22.5W. This charging speed falls short of the capabilities of many modern Android phones.
❌ You want a more compact battery: Weighing 12.8oz (363g), the Iniu PD 22.5w 20000mAh power bank is quite hefty. While pocketable, its weight might make it cumbersome for everyday carry. Consider lighter alternatives if portability is a priority.
With a big 20,000mAh Lithium Polymer battery, this power bank delivers multiple charges for all your devices. In our real-world testing, charging an iPhone 12 Pro to 100% once daily for three days depleted the power bank to only 54%, and we think this equals a week's worth of charge for typical usage.
The power bank supports 22.5W charging, which is fine for iPhones but falls short of the faster charging speeds supported by today's best Android phones (the OnePlus Nord 4 can charge up to 100W). It's also not powerful enough to charge a MacBook.
Equipped with a USB-C port and two standard USB ports, the Iniu PD 22.5w 20000mAh allows simultaneous charging of up to three devices. This multi-device charging capability makes it versatile for users who carry multiple gadgets.
We really liked its sleek design. An LCD screen clearly displays the remaining charge, providing precise monitoring of power levels.
This power bank is relatively bulky and heavy. It lacks IP weatherproofing, so keep it dry. However, it's still pocketable and proved durable enough to withstand a music festival, including a day of heavy rain.
The Iniu PD 22.5w 20000mAh power bank excels in providing ample power at an affordable price. While it may not offer the fastest charging speeds or advanced features like wireless charging, its substantial capacity and multi-device charging capabilities make it a good option for users who want to keep multiple devices charged.
The best power bank value
✅ 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.
❌ 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.
Before you buy, why not check out the latest Anker promo codes?
The best power bank for laptops
✅ You have multiple large devices
All of the Anker Laptop Power Bank's three USB-C outputs can charge up to 100W, which is plenty of power for most modern laptops and tablets.
✅ You forget that essential cord
With two integrated USB-C cables, one of which doubles as a carrying handle, this power bank offers handy cords if you often forget your own.
❌ You need something lighter
Weighing more than a pound (more than half a kilo), the Anker Laptop Power Bank isn't light. You won't be able to stuff this one into a pocket, for sure.
❌ You don't need a lot of power
That 165W output and 25,000mAh capacity will be overkill if you only need to charge your phone and your earbuds, not a laptop.
The Anker Laptop Power Bank is a robust solution for charging high-powered devices on the move, offering a substantial 165W output and a 25,000mAh capacity. While it's made for heavy-duty use, it maintains a relatively slim profile, though its weight and thickness are considerable.
We loved the integrated display, which provides real-time readouts of temperature and wattage for each of the four outputs, a feature not usually found on competing power banks.
The power bank includes one USB-C and one USB-A port on its side, along with two innovative built-in cables. One cable forms a loop that doubles as a carrying handle, while the other is retractable and magnetically secures to the base. Both cables are thick and durable, with robust support, effectively minimizing cable clutter and eliminating the need to carry separate cables.
Performance-wise, the Anker Laptop Power Bank delivers impressive charging speeds. All three USB-C outputs support up to 100W, and the device charged my M3 MacBook Pro and iPhone 16 to 50% in approximately 30 minutes. Real-time wattage tracking is displayed during charging. In my lab tests, a full recharge of the power bank itself took just 90 minutes. It can also charge four devices simultaneously, with a maximum output of 130W, and includes a trickle charging mode for low-power devices.
Priced at $99 / £89, the Anker Laptop Power Bank offers excellent value for its power, versatility, and convenience. For users who frequently travel with large devices and require reliable portable power, this power bank is a solid and dependable companion.
The best magnetic stand power bank
✅ You want fast-charging
You'd be forgiven for thinking that Ugreen simply made a novelty, cutesy MagSafe power bank, but I'm delighted to say they've created a charger that's as fast as it is cute.
✅ You want something whimsical
It's not for everyone, but if you appreciate adorable and eccentric things, like me, these emoji battery symbols will make you smile.
❌ You want something super compact
If you want a super slim option that's barely noticeable while attached to your iPhone, look for something thinner than this one.
❌ You need total reliability
My sample didn't always charge my phone after I'd attached it to the MagSafe pad. We'll keep testing in case reliablity is a long-term issue for this brand.
The Ugreen Uno Magnetic Wireless Power Bank 10000mAh 15W distinguishes itself with its whimsical, emoji-based display, though its aesthetic may not appeal to everyone. If you want a MagSafe power bank with a touch of personality, this device is a compelling option. It helps that we've seen frequent discounts from its official list price of $69.99 / £64.99.
In terms of size and weight, the Ugreen Uno strikes a balance, neither overly bulky nor compact. The device features a combination of soft-touch silicone for the MagSafe charging surface and metallic plastic for the casing. An integrated metal stand provides support for the power bank so you can use your phone in Standby mode while it's charging.
The power bank’s most distinctive feature is its smart display, which uses emoji faces to indicate battery levels. These animated expressions can easily be disabled if you're not in the mood.
Charging performance was impressive, and the Ugreen Uno fully charging my iPhone 13 Pro in under two hours, making it one of the fastest MagSafe power banks we've. The combination of rapid charging and the unique emoji display makes the Ugreen Uno a worthy contender if you're looking for effective wireless charging that also happens to be cute.
The best power user power bank
✅ 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.
❌ 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
✅ 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.
❌ 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.
Before you buy, why not check out the latest Anker promo codes?
The best cheap MagSafe power bank
✅ 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.
❌ 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 bargain power bank
✅ You need more power for less money: The Baseus Airpow power bank starts at $20 in the US and is on sale often, 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.
❌ 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.
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.
The best Apple Watch power bank
✅ You worry more about your Apple Watch battery: Big iPhones have a big battery, but your watch might not last the day. You don't need a big phone battery when this cute 2-in-1 charger makes a great option instead.
✅ You want your watch to be a desk clock: The Apple Watch has a charging made that makes it a small clock, and this battery turns your watch into a timekeeper that won't get in the way while you're typing, while also keeping your battery full.
❌ You have a watch that isn't from Apple: The Otterbox 2-in-1 Power Bank only attaches magnetically to the Apple Watch. Other smartwatches, like the Pixel Watch, won't work with this one, not at all.
❌ You need power for your phone: The 3,000mAh battery inside is plenty to keep your Apple Watch going, but that isn't enough power to get you even halfway charged on an iPhone 15, and even less on bigger phones.
The Otterbox 2-in-1 Power Bank with Apple Watch is a unique solution to a common problem. Your phone lasts longer than ever before, but wearable batteries haven't quite caught up to the all-day promise. With this cute little power bank, you don't need to bring the special Apple Watch charging cable or a larger battery. This little doodad does the trick.
The front of the battery is a magnet, and it can hold the Apple Watch standing up. The Apple Watch offers a standby screen with a clock when it's charging, making this power bank effectively a small desk clock, which can be a useful tool if you need to keep time but hate wearing a watch while you type.
Unfortunately, that magnet isn't quite strong enough for the fanciest Apple Watch bands I own. I have a gorgeous titanium Apple Watch band sent from Nomad, and it was too heavy to hang onto the Otterbox Power Bank's magnet, even though its titanium is incredibly lightweight compared to other metal bands. That's not a big surprise, there are a few chargers this larger band won't fit.
Frankly, the power-to-weight ratio for this little power bank isn't very impressive, it's heavy for the slim 3,000mAh power that it offers. Instead of efficiency, you get to leave your extra-long, super-annoying Apple Watch cable at home and instead just pop your watch onto this cute little thing. It's a worthwhile trade, at least if Watch power is your biggest concern.
There isn't quite enough power in the Otterbox 2-in-1 power bank to recharge a phone fully, but you're welcome to try. Besides the Apple Watch magnet, it also has a USB-C port that can charge up to 15W, so you can feed some headphones or get a few more hours of screen time in a pinch.
The best combo power bank
✅ You were already planning on carrying both: A lot of people carry a water bottle every day, and often bring a power bank along for extra charging. Why not carry both in one device?
✅ You work or study from a library or cafe: The Tylt Bottle 2 is really the perfect device for students in a library or working from a cafe. Rest your phone on the wireless puck and let it charge while you work, without fussy wires and outlets.
❌ You need a lot of power: Thankfully, the battery on the Tylt Bottle 2 isn't so big it adds too much weight, but that also means it isn't powerful enough for multiple charges.
❌ You need fast power: This is a very slow charger, whether wired or wireless, so it's better for casual charging while you sip your water and read a book.
There are plenty of combination power bank and some other device, but the Tylt Bottle 2 actually makes sense because we're usually carrying an insulated water bottle anyway, so we might as well screw a battery onto the bottom. With a 5,700mAh capacity, the Tylt Bottle 2 is just enough to get us through a very busy day, or keep the phone powered while we play games at the cafe.
The bottle is actually a nice, insulated affair, and it kept ice in cold water for 12 hours, which is all that we need. It has a good, strong strap to carry the bottle, though we would have liked a lid that was easier for sipping.
You can buy the Tylt Bottle with just a power bank attached, but our review sample from AT&T had the full wireless charging treatment. It's easy to set up a phone to charge while studying, working out, or working away from home: all places we take a water bottle and need a full phone battery.
Tylt could have just added a wireless charging feature and called it a day, but the Tylt Bottle 2 has a few surprises on board. First of all, in addition to wireless charging, you still get both a USB-C and USB-A port for charging just about anything you have.
Tylt also wisely left enough of a gap between the battery and the bottle that you can coil a small USB-C cord (included) into that space. That way, even if you're not charging wirelessly, you're not adding a lot of extra bulk to your bag. It's a smart setup.
Admittedly, making a battery that also fills up with water is a quick way to make a heavy battery, so we won't knock Tylt for being a heavy power bank. If you were already carrying both, the Tylt Bottle 2 power bank insulated water bottle combo is a fun, smart way to keep your kit charged.
This bottle isn't available on Amazon, but you can find it elsewhere, including directly from AT&T as one of the accessories they offer when you buy a phone. Maybe that means we'll see it offered in a bundle deal sometime soon.
How to choose the best power bank for you
How do I choose the best power bank for me?
If you are charging a small smartphone, a simple power bank will suffice. If you plan on charging a laptop occasionally as well, or many devices at once, you'll want a power bank with more power and more features.
If you have a newer Android phone, or the latest iPhone models, you'll want a power bank with faster charging speeds to get your battery full faster.
You can also find a power bank that charges your phone (or even your Apple Watch) wirelessly. These will usually charge slower, but they can be very convenient if you want to leave wires at home.
Which power bank is the best quality?
Anker makes the best power banks we have tested so far, but batteries from Baseus and Otterbox also performed well. All of the power banks on this list passed our testing, traveling with us on the road and powering our devices at home.
Anker is the best in part because it packs more power into its batteries at a lower weight. Its batteries charge faster than competitors. Its small Anker Nano battery has the best power-to-weight ratio of any battery on our list.
Which brand is best for power banks in 2023?
Anker is making some the best power banks right. It offers the best power-to-weight ratio, the fastest charging, and the most useful features. We have also been impressed by power banks from Iniu, which have done very well in our hands-on tests.
How many times can my power bank charge my phone?
A 10,000mAh battery will give your phone around 6,000mAh of extra battery charge. That means a 10,000mAh battery can charge that phone twice ... almost. You may not get to 100% the second charge, but you'll be in the 90% range.
Any power bank that is 5,000mAh or smaller will probably not guarantee 100% charge on an iPhone 16 or larger phone. If you have a big battery phone like the Galaxy S24 Ultra, which packs 5,000mAh inside, you'll need a power bank closer to 8,000mAh or more if you want a full recharge.
How we test the best power banks
We have tested the best power banks by using them to charge a variety of devices, including Apple iPhone, Google Pixel, and Samsung Galaxy phones. We have also charged Apple iPad tablets, and small laptops including a Pixelbook Go and a Surface Laptop Go.
We used the best power banks extensively while traveling to see how well they fit in our luggage and their relative utility versus the weight add to our pack.
Using the Anker Prime power bank, we were also able to test the charging speed claims of other power banks, as the Anker Prime will report charging speed in wattage.
- Looking for a laptop charger? Here are our best portable laptop chargers. We've also featured the best portable projectors.
