The 20 Best Portable Chargers for All of Your Devices

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Portable devices have a Murphy’s law–like ability to run out of power at the least convenient moment: as you step on the bus, right in the middle of an important meeting, or just as you get comfortable on the couch and press Play. But if you keep a battery-powered portable charger handy, all those situations are a thing of the past.

There are hundreds of portable battery packs, and picking one can be confusing. To help, we've spent years working our way through all of them. This obsession started when Scott Gilbertson lived off-grid in a vintage RV, powered primarily by solar panels. But even if you're not living in an off-grid solar setup, good power banks will come in handy. These are our favorites. Be sure to check out our Best MagSafe Power Banks guide for Apple-specific portable chargers, and our Best Portable Power Stations guide if you need more power.

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Capacity: The capacity of a power bank is measured in milliampere-hours (mAh), but this can be a little misleading because the amount of power you get out depends on the cable you use, the device you are charging, and the charging method (Qi wireless charging is less efficient). You will never get the maximum capacity. We try to provide an estimate of what you’ll get in terms of charges for devices.

Charging speeds and standards: The charging rate for devices like smartphones is measured in watts (W), but most power banks list the voltage (V) and the amperage (A). Thankfully, you can calculate the wattage yourself simply by multiplying the voltage and amperage. Unfortunately, getting that maximum rate also depends on your device, the standards it supports, and the charging cable you use. Many smartphones, including Apple’s iPhones, support the Power Delivery (PD) standard, meaning you can use higher-power power banks to recharge the device with no issues. A few phones, such as Samsung’s Galaxy S range, support a supplementary PD protocol called PPS (Programmable Power Standard) that goes up to 45 W. Many phones also support Qualcomm’s proprietary Quick Charge (QC) standard. There are also other proprietary fast-charging standards, but you won’t generally find power banks that support them unless they come from the smartphone manufacturer.

Pass-through: If you want to charge your power bank and use it to charge another device simultaneously, it will need pass-through support. The Nimble, GoalZero, Biolite, Mophie, Zendure, and Shargeek portable chargers listed support pass-through charging. Anker discontinued support for pass-through because it found that differences between the output of the wall charger and the input of the device charging can cause the power bank to cycle on and off rapidly and shorten its lifespan. Monoprice does not support pass-through charging, either. We would advise caution when using pass-through, as it can also cause portable chargers to heat up.

Travel: It’s safe to travel with a power bank, but there are two restrictions to keep in mind when you board a flight: You must have the portable charger in your carry-on luggage (it cannot be checked in), and it must not exceed 100 Wh (watt-hours). If your power bank has a larger capacity than 27,000 mAh, you should check with the airline. Below that should not be a problem.

The Nimble Champ topped this list for years, and now its successor is taking over by combining everything that made the original so good and bringing some welcome improvements. At 6.2 ounces, it's one of the lightest on the market. It's smaller than a deck of cards and can deliver 20 watts to charge two devices at once via a USB-C port on either end. While Scott used the original for years, the new version has only just landed, but so far, so good. It feels durable, comes in a snazzy new range of speckled color finishes, and has a bright lanyard loop that makes for easy carrying and helps you pick it out of your backpack. The Pro version is bigger but doubles the capacity (to 20,000 mAh) and has a similar design with two USB-C ports that go up to 65 watts. There's also a smaller version with a 5,200 mAh capacity that tops out at 15 watts.

The other reason we like Nimble best is because of its environmental efforts. Batteries are not environmentally benign. They use lithium, cobalt, and other rare metals whose supply chains are environmentally and socially questionable at best. But Nimble's use of bioplastics and plastic-free minimal packaging at least reduces the environmental impact where it can be reduced. This new version uses 90 percent recycled plastic (up 25 from the original) and comes in smaller plastic-free packaging. Nimble includes a 3.3-foot USB-C to USB-C cable in the box.

For folks who don’t mind paying for quality, the Anker 737 is a versatile and reliable beast with a whopping 24,000-mAh capacity. With Power Delivery 3.1 support, this power bank can send or receive up to 140 watts to charge phones, tablets, and even laptops. You can charge it from zero to full within an hour. It’s relatively compact for its capacity, but it weighs almost 1.4 pounds. Tap the circular power button on the side once, and the snazzy digital display shows the remaining battery percentage; tap it again, and you get stats including the temperature, total output, cycles, and more. The screen also displays watts in or out when you plug something in and a remaining time estimate based on the current rate. It fast-charged everything I tested it with, and you can charge three devices at once without a problem.

Two USB-C ports (140W) and one USB-A (18W). Can charge most phones at least four times (24,000 mAh).

You don’t have to spend big to get a high capacity power bank, and this offering from Monoprice proves it. This power bank is impressively versatile with five ports, and it offers QC 3.0, PD 3.0, and wireless charging support. Results are mixed, but it fast-charged most phones I tested. Wireless charging is handy when you don’t have a cable, but this is not a MagSafe charger, and the total amount of power you get is limited because it’s far less efficient than wired charging. Still, these are minor quibbles considering the low price. Tap the power button, and you can see how much juice is left in the bank. It comes with a short USB-C to USB-A cable.

One USB-C port (20W), three USB-A (12W, 12W, and 22.5W), and one Micro-USB (18W). Qi wireless charging (up to 15W). Can charge most phones three or four times (20,000 mAh).

If you want a compact charger in a fun color that simply slots into the bottom of your phone for a top-up, Anker’s dinky charger is tough to beat. This power bank has a built-in rotating USB-C or Lightning connector (MFi certified), so you don’t need to worry about cables. It packs 5,000 mAh of energy (enough to fully charge most phones). I tested the USB-C version with several Android phones and found it stayed in place, enabling me to use my phone more or less as normal. There’s a USB-C port for recharging the power bank, and it comes with a short cable. It might not be a good pick if you use a thick case.

One USB-C (22.5W) or Lightning (12W) connector and one USB-C port for charging only. Can charge most phones once (5,000 mAh).

WIRED reviews editor Julian Chokkattu has been enjoying his time toting around this 20,000-mAh charger. It's slim, fits easily into the padded sleeve of most backpacks, and has enough capacity to recharge an 11-inch tablet twice from zero percent. It's capable of dishing out 45 watts of power for fast charging via the USB-C port, and 18 watts from the middle USB-A port. In a pinch, you can use it to recharge a laptop (as long as it's not a power-sucking machine like a MacBook Pro). It has a lovely fabric material on the exterior, and there's an LED that shows how much juice is left in the tank.

Two USB-A ports (18W and 10.5W) and one USB-C (45W). Can charge most tablets two times (20,000 mAh).

Goal Zero updated its Sherpa line of portable chargers with better wireless charging capabilities: 15 watts, up from 5 watts in the previous model. I tested the Sherpa AC, which features two USB-C ports (60-watt and 100-watt), two USB-A ports, and a 100-watt AC port for those devices that need a pronged plug. It strikes a good balance between power storage (93 watt-hours in my drain test) and weight (2 pounds). It’s enough to charge up my Dell XPS 13 almost twice.

You get a nice color LCD display that shows how much power you've got left, how many watts are coming in, how many are going out, and a rough guess as to how much longer the battery will last (if conditions remain the same). Recharge times vary depending on whether or not you have the Sherpa wall charger (sold separately), but I was able to get it to recharge in under three hours no matter what power source I used. There's also an 8-mm port on the back for attaching a solar panel if you have one. The Sherpa is not cheap, but if you don't need the AC out and can live with a single USB-C (100-watt out, 60-watt in), the Sherpa PD is otherwise the same thing for $200.

Two USB-C ports (60W and 100W), two USB-A (12W), and one AC (100W). Qi wireless charging (15W). Can charge most laptops one to two times (25,600 mAh).