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Best Laptop Power Banks for 2025

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There’s nothing worse than trying to get work done offsite and realizing your laptop is nearly dead. While there are certainly worse things, running out of battery when you’re not near an outlet can be seriously inconvenient. Laptop power banks are similar to those you may have used to top off a smartphone, but with larger capacities and more ports. There’s no standard rating to qualify a battery as a laptop-grade brick, but here we only considered versions with at least a 20,000mAh capacity so they can deliver enough charge while remaining under 27,000mAh (99Wh) to comply with airline regulations for carry-on luggage. After testing a slew of popular options over the past couple of years, we believe these are the best laptop power banks you can buy.

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Table of Contents

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Best Laptop Power Banks for 2025

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In this section, we will explore the top-rated laptop power banks available in 2025. Each product has been selected based on extensive testing and user feedback.

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What to Look for in a Laptop Power Bank

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Capacity

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If you just need to keep a smartphone from dying before you can make it home, just about any power bank will do. However, if you need to revive multiple devices or the substantial battery of a laptop, you’ll want something with a high milliamp-hour (mAh) capacity. A power bank capable of delivering enough power to a laptop will typically have a capacity between 20,000 and 27,000 mAh.

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Going higher than 27,000mAh may prevent you from being able to take it on an airplane, which is why most portable chargers top out around that number. Since the voltage for most portable power banks is around 3.7 volts, a 27,000mAh battery translates to 99.9 watt hours — which is the maximum capacity allowed by the TSA will allow for carry-on luggage. It is important to note that these batteries can’t be checked, regardless of size.

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If you want something even bigger than a laptop power bank and don’t need to fly with it, you might consider portable power stations. These can be the size of a car battery or larger and can potentially fuel an entire weekend away.

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Another consideration is that the capacity listed in a power bank’s specs is not what will be delivered to your devices. For instance, even the large battery on a 16-inch MacBook Pro or a Dell XPS 16 has a mAh rating of around 5,000 – 6,000mAh, so you might think you’d get five full charges, but in reality, you only get about a single 70-percent charge. The voltage is different (typically 3.7V for the power bank and 11.4V for a laptop), which makes the watt-hours, or the amount of energy each battery can hold, different (working out to 92Wh for the battery and 72Wh for the built-in laptop batteries). Additionally, a voltage conversion occurs when charging a laptop from a power bank, which dissipates a significant amount of energy.

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In summary, a power bank with a 25,000mAh (or 92Wh) capacity will typically fill a 5,000mAh (or 72Wh) laptop battery to about 75 percent. In my tests, I averaged about a 60-percent efficiency rate between a power bank’s listed capacity and the actual charge delivered.

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Ports

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Every large power bank I’ve tested has at least three USB ports, with a mix of USB-C and USB-A, which should cover nearly any portable device you need to recharge — earbuds, phones, tablets, laptops, and more. In addition to the different plug formats, some ports supply power at different wattages. For example, one USB-C port might be rated for 60 watts, while the one next to it is rated for 100 watts. If you have a device capable of 70W fast charging, such as the new MacBook Air, you’d want to opt for the 100W port to achieve the best charging speeds possible. Note that devices with a smaller wattage draw won’t be negatively affected by connecting to ports with high ratings.

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Some of these larger batteries also feature AC ports. While it might seem natural to plug in your laptop’s power adapter for a recharge, the AC port should only be used for devices that can’t utilize USB — such as a lamp or a printer. Plugging a power adapter into the AC port wastes energy through conversion. The battery converts its DC power to supply the port with AC power, and then the power adapter converts that AC power back to DC for your laptop. Each time energy is converted, some is lost to heat and other dissipations. It is more efficient to send that DC power directly from the battery to the device.

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You can also use more than one port at a time with these devices; just remember that the charging speed will likely decrease, and the battery will drain proportionally to what you’re refilling.

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Wireless Charging

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In the last year and a half, wireless charging capabilities in portable power banks have noticeably improved. The initial models I tested were slow and not worth recommending. Now, the wireless pads built into power banks are impressively fast — particularly when charging Samsung Galaxy phones. However, the lack of a stabilizing magnetic connection like Apple’s MagSafe means they only work when rested flat on a pad. Most wireless charging connections can be used while other ports are also being employed, making them convenient for some mobile battlestation setups.

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It is important to note that wireless charging is always less efficient than wired connections. If you want to waste as little energy as possible, it is advisable to stick to wired connections.

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Design

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All power banks are designed to be portable, but there’s a significant difference between a pocket-friendly 5,000mAh battery and one of these laptop-compatible models. Most of the latter weigh between a pound and a half to two pounds, which is a considerable addition to a backpack. Many of the options listed here feature a display to indicate how much charge remains in the battery, which is helpful when you’re trying to manage charges to your devices. If a bank has a wireless connection, the pad is usually on the flat top, and any available AC connection is typically at one end. Both may require you to engage those charging methods. It is advisable to familiarize yourself with the buttons to avoid frustration during use.

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How We Test Portable Laptop Chargers

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For the past year and a half, I’ve been testing and using dozens of portable batteries for our other battery guide. Some of those batteries include the higher-capacity power banks featured here. I also acquired a few additional banks specifically for this guide to ensure comprehensive coverage of available options. I focused on brands I’m already familiar with, as well as battery packs from well-received manufacturers I hadn’t tried before (like UGREEN and Lion Energy). I only considered banks with at least a 20,000mAh capacity and primarily selected those rated 25,000mAh and higher.

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Here’s everything we tested:

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Due to shipping and travel issues, I wasn’t able to test two of the batteries I had slated: the HyperJuice 245W and the UGREEN Power Bank 25,000mAh. Once I’ve had a chance to evaluate these two models — as well as any new worthy contenders that hit the market — I’ll update this guide accordingly.

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I tested each power bank with an iPhone 15, a Galaxy S23 Ultra, an iPad Air (M1), and a 16-inch MacBook Pro with the

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