There are six power banks on my desk right now. On the shelves behind me are a dozen (two dozen?) more. Over the past three years, I’ve tested more than 55 portable battery packs for Engadget — and can attest these handy devices are only getting better. If you often forget to charge your phone or find yourself traveling for work or leisure, having one of these in your bag can be a lifeline. Here you’ll find banks ranging from Qi2-enabled slabs for wireless phone refills to larger bricks that can save a dying laptop. Here are the best power banks you can buy, according to our tests. Table of contents Best power banks for 2025 How we test best power banks What to look for in a portable battery pack Other power banks we tested Power bank FAQs Best power banks for 2025 What to look for in a portable battery pack Battery type Nearly every rechargeable power bank you can buy (and most portable devices) contain a lithium-ion battery. These beat other current battery types in terms of size-to-charge capacity, and have even increased in energy density by eight fold in the past 14 years. They also don’t suffer from a memory effect (where a battery's lifespan deteriorates due to partial charges). Flying with portable batteries You may have heard about lithium ion batteries overheating and catching fire — a recent Hong Kong flight was grounded after just such a thing happened in an overhead bin. Current restrictions implemented by the TSA still allow external batteries rated at 100Wh or less (which all of our recommendations are) to fly with you, but only in your carry-on luggage — they can’t be checked. Recently, Southwest Airlines was the first in the industry to take that rule one step further. Now, flyers on that airline must keep power banks in clear view when using them to recharge a device. If the portable charger isn’t actively in use, however, it can stay in your carry-on bag in the overhead bin. Capacity Power bank manufacturers almost always list a battery’s capacity in milliamp hours, or mAh. Smaller batteries with a 5,000mAh capacity make good phone chargers and can fill a smartphone to between 50 and 75 percent. Larger batteries that can recharge laptops and tablets, or give phones multiple charges, can exceed 25,000mAh and we have a separate guide that covers that entire category. Unsurprisingly, the prices on most batteries goes up as mAh capacity increases, and since batteries are physical storage units, size and weight go up with capacity as well. If you want more power, be prepared to spend more and carry around a heavier brick. You might think that a 10,000mAh power bank could charge a 5,000mAh phone to 100 percent twice, but that’s not the case. In addition to simple energy loss through heat dissipation, factors like voltage conversion also bring down the amount of juice that makes it into your phone. Most manufacturers list how many charges a battery can give a certain smartphone. In our tests, 10,000mAh of battery pack capacity translated to roughly 5,800mAh of device charge. 20,000mAh chargers delivered around 11,250mAh to a device, and 25,000mAh banks translated to about 16,200mAh of charge. That’s an average efficiency rate of around 60 percent. Wireless Wireless charging, whether through a bank or a plugged-in charging pad, is less efficient than wired connections. But it is convenient — and in most cases, you can carry around and use your phone as it refills with a magnetically attached power bank. Power banks with wireless charging are far better than they once were. Just a couple years ago, the ones I tested were too inefficient to recommend in this guide. When batteries adhering to the Qi2 wireless charging standard started arriving in 2023, performance markedly improved. To gain Qi2-certification, a device has to support speeds of up to 15 watts and include magnetic attachment points. The MagSafe technology on iPhones were once the only handsets that were Qi2-compatible, but now Google’s Pixelsnap tech brings both the higher speed and magnetic grip to Pixel 10 phones. Samsung may follow up with its own version in future releases. The latest wireless charging standard, Q12 25W, is supported by the new iPhone 17 phones as well as the Google Pixel 10 Pro XL. Battery packs that are Qi2 25W-enabled are starting to hit the market as well, and the Ugreen MagFlow was the first on the scene. Ports USB-C ports can deliver faster charges than USB-A ports, and most of the portable chargers we recommend here have Type-C connections. But Type-A jacks are still handy if you need to use a specialized cable for a certain device (my camera’s USB-A to micro USB cable comes to mind). There’s also variation among USB-C ports. Larger banks with more than one port will sometimes list different wattages for each. For example, a bank with three ports may have two 65W ports and one 100W port. There will also be at least one in/out port on the bank, which can be used to charge the battery itself or to deliver a charge to your device. Wattages and in/out labels are printed right next to the port — and always in the tiniest font possible (remember, your phone is an excellent magnifying glass if you ever have trouble reading them). As with standard wall chargers, the port’s wattage will determine what you can charge. A phone will happily charge off a 100W connection, but a 15W plug won’t do much for your laptop. And remember, the cable has to match the maximum wattage. A cable rated for 60W won’t deliver 100W speeds. Luckily, some of the best power banks include a built-in USB-C cable. That’ll not only ensure you have the right cord, it’s one less thing you have to remember to bring along. Design Once, most rechargeable batteries were black with a squared-off, brick-like design, but now they come in different colors and shapes with attractive finishes and detailing. While that doesn’t affect how they perform, it’s a consideration for something you’ll interact with regularly. Some portable power banks include extra features like MagSafe compatibility, a built-in wall plug or even a kickstand. Nearly all have some sort of indicator to let you know how much available charge your power bank has left, usually expressed with lighted pips near the power button. Some of the newer banks take that a step further with an LED display indicating remaining battery percentage. How we test best power banks Before I even put my hands on a battery pack, I did extensive research. I considered brands Engadget reviewers and staff have tried over the years and checked out customer ratings on retail sites like Amazon and Best Buy. Then, I acquire the most promising candidates and test them in my home office. Amy Skorheim for Engadget Here’s the full list of power banks we've tested, which range from small wireless banks to large, multi-device batteries: MagSafe-compatible Apple MagSafe Battery Pack (5,000 mAh) Spigen ArcHybrid Mag (5,000mAh) Anker 521 Magnetic Battery (5,000 mAh) Mophie snap+ PowerstationMmini (5,000mAh) Baseus Magnetic (10,000mAh) Anker MagGo Power Bank (6.6K) (6,600 mAh) Anker 633 Magnetic Battery (10,000mAh) Anker MagGo Power Bank (10K) (10,000 mAh) UGREEN 10,000mAh Magnetic (10,000mAh) EcoFlow Rapid Magnetic (5,000mAh) Low capacity (≤10,000mAh) Mophie Juice Pack (2,400mAh) Anker 511 Power Bank (5,000 mAh) Anker 313 Power Bank (10,000mAh) Nimble Champ (10,000mAh) Biolite Charge 40 PD (10,000mAh) Anker Nano (5,000mAh) Nimble Champ (10,000mAh) Satechi Quatro Wireless bank (10,000mAh) Anker 10K Fusion power bank (10,000mAh) Mid capacity (10,001 - 20,000mAh) Baseus Blade 2 (12,000 mAh) Otterbox Fast Charge (15,000mAh) Mophie Powerstation Pro (20,000mAh) Anker Prime (20,000mAh) Nestout Portable Charger (15,000mAh) Nimble Champ Pro (20,000mAh) InfinaCore P3 Pro (10,500mAh) High capacity (20,001mAh+) Mophie Powerstation Pro XL (25,000mAh) UGREEN Power Bank 25,000mAh 145W (25,000mAh) Anker 737 Power Bank (25,600 mAh) Zendure Supertank Pro (26,800mAh) Mophie Powerstation Pro AC (27,000mAh) Lion Energy Eclipse Mag (27,000mAh) Lion Energy Trek (27,000mAh) HyperJuice 245W (27,000mAh) Anker Prime 27,650mAh Power Bank (27,650mAh) Anker laptop power bank with built-in cable (25,000mAh) Belkin Boost Charge 20K with built-in cable (20,000mAh) We're continuously updating this guide as companies release new products and we test them. We remove some products as we find picks that are more worthy of the best portable charger designation. We also add updated specs and prices where necessary. For testing, I used each battery with some combination of an iPhone 16, iPhone 15, iPhone 14 Plus, iPhone 11, a Samsung Galaxy S22 Ultra, a Galaxy S23 Ultra, a 5th-gen iPad Air and an M1 Pro 16-inch MacBook Pro. I charged one phone battery at a time, even though some packs are capable of multiple-device charging. I charged the phones and tablets from between zero and five percent until they were 100 percent full (or until the power bank was dead), and didn’t use the phones or tablets while they charged other than to power them on and enter the unlock code. In the case of the MacBook, I used it while it was charging (it’s my work computer). I used the charging cable included with each power bank to charge the Galaxy S22 Ultra, MacBook Pro and the iPad Air. For the iPhones, I used the USB-C to Lighting cable that Apple provides. In the case of the lower-capacity power banks that didn’t include a cord or included one with USB-C to USB-A connectors, I used this 60W-rated USB-C to USB-C cable. For reference, here are the battery capacities of each device we used for testing: iPhone 11: 3,110 mAh iPhone 14 Plus: 4,325 mAh iPhone 15: 3,349 mAh Galaxy S22 Ultra: 4,855mAh iPad Air: 7,729mAh 16-inch M1 Pro MacBook Pro: 27,027mAh I noted the times for each charge and the number of charges each bank provided. I also paid attention to things like ease of use and overall design. Other power banks we tested HyperJuice 245W Hyper’s massive-but-sleek brick is one nice looking power bank. The HyperJuice 245W packs a hefty 27,000mAh capacity, enough to refill my tester phone about four times and get a MacBook Pro from near-dead to 75 percent. It only has USB-C ports, but you at least get four of them. USB-C only is probably fine for most situations, but a USB-A port would be nice for charging the occasional older peripheral. The 245 wattage is pretty high for a power bank and it was indeed speedy. It filled a Samsung Galaxy S24 Ultra in just over an hour. But it’s the same price and capacity as our Mophie Powerstation pick for laptop banks, and that one has a better variety of ports. Hyper’s battery is also comparable to Anker’s laptop battery, which is cheaper, has built-in cables and has nearly the same capacity. Plus, that bank is just as swanky looking. Anker Prime 20,000 mAh power bank Anker’s Prime bank was our previous pick for the best premium power bank, but I thought it worked best with the expensive (yet very convenient) base. Considering it also doesn’t have any built-in cables, we decided to bump the Prime battery from its position and replace it with the Anker Retractable Cable Laptop Bank. There’s still plenty to like about the Prime battery: it’s solid, attractive and tells you just how much charge it has left with its onboard display. When you add the optional base, you not only get a convenient drop-and-go way to recharge, it also acts as a charging hub with three additional USB ports. EcoFlow Rapid magnetic power bank I was curious to try out the first power bank from EcoFlow, a company that primarily makes larger power stations and whole-home backup batteries. The first offering in the brand’s Rapid series is a Qi2-enabled magnetic charger with a 5,000mAh capacity. It looks quite nice with shiny silver accents and soft-touch grey plastic on the MagSafe-compatible front. There’s a little pull-out leg that sturdily displays your phone as it charges and the attached USB-C cable lets you refill devices directly, then tucks out of the way when it’s not in use. But it didn’t outperform our top pick in the MagSafe category, in terms of both charging speeds and the amount of charge delivered. Baseus Blade 2 The Blade 2 from Baseus has a unique, flat shape that’s just a little wider than an ereader — which may make it easier to slip into a low profile laptop bag. It charged a Samsung Galaxy S23 Ultra considerably faster than any other battery bank we tried, getting it from four percent to full in just over an hour. It then filled the phone back to 62 percent from dead on a second charge in about a half an hour. But $100 is a lot for a standard power bank that holds fewer than two full charges. But if you can find the Blade 2 on sale, snap it up. Anker MagGo (6.6K) Anker’s 6.6k MagGo is pretty similar to our top pick for a MagSafe-compatible battery pack. It supports the Qi2 charging standard and props up your iPhone so you can use it or enable StandBy mode while powering up. This one even lets you set the viewing angle from 30 to 65 degrees. It was speedy in getting an iPhone 15 up to 50 percent in about 40 minutes. But for the added bulk, it doesn’t have as much capacity as the 10K MagGo, holding just enough juice for a single full charge plus about 5 percent. But it is $20 cheaper, which may be key for some. Mophie Snap+ Powerstation Mini The Mophie snap+ Powerstation Mini is terribly well-built. It feels premium with a rubberized contact point for the MagSafe charging pad and a stand that runs the entire width of the bank itself, making it extra sturdy. It’s compact, too, but only carries a 5,000mAh capacity, which gets you a partial charge on most newer or larger phones. Our current MagSafe/iPhone pick has double the capacity, a stand and a digital display — for just $20 more than the Powerstation Mini. Power bank FAQs What's the difference between a portable power bank and a portable charger? A slew of terms are used to describe power banks, including portable batteries, portable chargers, external battery packs and even, somewhat confusingly, USB chargers, which is what wall chargers are often called. They all mean the same thing: a lithium ion battery that stores a charge so you can refill a smartphone, tablet, earbuds, console controller, ereader, laptop, or just about any other device with its own built-in, rechargeable battery. There’s little difference between the terms, so the specs you’ll want to pay attention to are capacity (expressed in mAh), size and weight so you can find the right balance between recharging what you need and portability. Power stations, on the other hand, are distinct. These are bigger units (often around the size of a car battery) that can be used to charge multiple devices multiple times, but notably, they can’t be taken on airplanes. Does fast charging actually ruin your battery? Not exactly. The real enemy of a battery’s longevity is heat. The faster you charge a battery, the more heat is generated. Modern phones have features that keep the battery cool while charging, like physical heat shields and heat sinks, as well as software features that slow down processes that generate too much heat. Phone manufacturers are keen to promote a phone’s fast-charging abilities, so they had to figure out ways to make faster charging work. While there aren’t long-term studies on what fast charging does to a phone, a study on EV batteries (which use the same general concept of charged lithium ions flowing from one side of the battery to the other, absorbing or releasing a usable charge) showed a very slight decrease in capacity over time with only fast charging — though what actually made a larger difference was how hot the battery itself was, due to ambient temperatures, when it was charged. In short, fast charging could be slightly harder on your battery than normal charging. But the safeguards most smartphones have make that difference fairly negligible. To really ensure you’re taking the best care of your battery, limiting heat exposure overall is one of the best things you can do. Can you use a power bank for all your devices? That depends on the size of the bank and the size of your device’s battery. A small 5,000mAh battery isn’t strong enough to charge laptops, but a portable charger with a 20,000mAh capacity will give your computer a partial refill. You also have to consider port compatibility. If your device has a USB port, you’ll be able to easily find a cable to connect it to a battery. If your device has a more unique port, such as a DC port, you won’t be able to use a battery. Devices with an AC cable and plug can be charged, and sometimes powered (such as in the case of a printer or speaker), by larger laptop batteries with AC ports.This article originally appeared on Engadget at https://www.engadget.com/computing/accessories/best-power-bank-143048526.html?src=rss