Best power banks 2025: Portable charging for astronomers

Person outside using one of the best power banks to charge smartphone
The best power banks enable skywatchers and astrophotographers to have extra peace of mind when they're on the go. (Image credit: Getty)

These days, astronomy enthusiasts are spoilt for choice with all the equipment we can pick up to enhance our stargazing experience, from the flashlights to phone apps and beyond. But they're useless without power, which is why owning one or more of the best power banks can be a real boon.

Maybe you own one of the best cameras for astrophotography and are all ready to capture stunning images of the planetary parade this February 24. Or perhaps you've made it your mission to record the total lunar eclipse that takes place this March 13-14, a breathtaking blood moon. Run out of power, however, and your evening is ruined.

That's why we've rounded up the best power banks for astronomers and astrophotographers, covering a range of budgets and needs. Some of these devices will slip neatly into your pocket, alongside your phone. Others are heavy-duty power stations that could keep multiple pieces of equipment charged, including the best flashlights and the best headlamps. So read on and make sure you're not left in the dark.

The quick list

Best power banks and power stations we recommend in 2025

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Best power banks we recommend 2025

Best overall

UGREEN Nexode Power Bank

Best overall: Massive capacity power bank encased in an aluminum shell with an informative OLED screen to boot

Specifications

Capacity: 25000 mAh, 90Wh
Output ports: 2x USB-C 140W and 100W Max, 1x USB-A 22.5W Max
Charging time: 150 minutes
IP rating: None
Weight: 1.25 lbs (609g)

Reasons to buy

+
Sleek design
+
TFT smart display
+
USB-C and USB-A ports

Reasons to avoid

-
On the heavier side
-
No IP rating
Buy if:

✅ You want a digital display: This power bank has a crisp TFT display that shows precisely how much charge you have left.

You want to travel with it: This one is TSA-compliant so you can take it in your hand luggage.

Don't buy if:

You want a super lightweight power bank: At 1.3 lbs (609g), it's not the lightest in this guide.

❌You're on a budget: This one will set you back over $100.

The bottom line:

🔎 UGREEN Nexode Power Bank: A sleek, high-tech power bank with a beautiful display, it has USB-C and USB-A ports and great compatibility. However, it's not super light and it does come with a high price tag.

The UGREEN Nexode Power Bank is a nicely designed piece of kit. Its sleek, smooth grey coating also features an anti-slip pad on one side to ensure better grip. What really sets it apart, though, is the high-res TFT smart display that shows you the amount of charge remaining, the voltage and the current so you can optimize your device charging. UGREEN has included a sweet little 'face' that changes depending on the device's status. This is superfluous, but some users may like its 'personality'.

We've been testing this power bank for a couple of months (the 25,000mAh model), and we've been very impressed with its performance. Like other UGREEN products we've reviewed over the years, it is a quality product that does exactly what it says on the tin. The USB-C and USB-A output ports mean it's compatible with a wide range of devices without needing an adaptor, from Apple laptops to smaller devices like smartwatches and phones.

The massive capacity means it can charge several devices multiple times on one charge, but the drawback is it's not the lightest power bank in this guide as a result. That said, we still recommend it as a good choice for those who travel frequently, as it is TSA-compliant and can be packed into your hand luggage. We took it on various trips, including festival camping, where it held its own despite hot operating temperatures and being 'thrown' in and out of the tent over long weekends.

The UGREEN Nexode takes about 2.5 hours to reach a full charge, and the PD 3.1 technology for fast charging means it can charge a MacBook Pro more than halfway in just 30 minutes, which is impressive. It also has a trickle charging to help prolong the lifespan of your electronic devices.

Overall, this is a premium power bank with a price tag to match, but we'd recommend it for those whose budget stretches that far.

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Test Results

Attributes

Notes

Design

Sleek, high res smart display

Functionality

Multiple ports, fast charging, trickle charging

Performance

Impressive, can't fault it

Best for portability

Best for portability: A compact, no frills and FAA carry-on-compliant, reliable power bank

Specifications

Capacity: 74Wh/ 20,000 mAh
Output ports: 1 x USB C-PD, 2 x USB A
Charging time: 5 hours by 18W USB C-PD
IP rating: None
Weight: 1 lb (465g)

Reasons to buy

+
Quick Charge 3.0 Protocol (fast charging)
+
Portable and durable
+
Reliable

Reasons to avoid

-
No % charge indicator
-
Multiple cables needed (USB-C to USB-C and USB-A to everything else)
-
No water resistance
Buy if:

✅ You want something simple: This power bank is simple, portable and reliable. With no fancy screens or other functionality, it just does what it needs to.

You're after Quick Charge 3.0 compatibility: This is required to activate fast charging modes on compatible devices.

Don't buy if:

You want to see the exact level of charge remaining: This power bank utilizes a 4-light LED indicator to show how much percent charge is remaining, so it's not as accurate as other models.

❌ You need something waterproof: There's no waterproof rating so it's best to use it where there's guaranteed to be no water or heavy condensation/moisture.

The bottom line:

🔎 BioLite Charge PD 20/40/80: A no-fuss, affordable power bank that can be relied on for multiple charges over a couple of nights. We really like BioLite's mission too.

BioLite is a manufacturer of outdoor and off-grid products, and it's on a mission to provide 20 million people with clean energy and to avoid 3 million tons of CO2 emissions by 2025. When you buy a BioLite product, you're helping them on that mission. But while we're big fans of BioLite as a company, we also love the BioLite Charge 80 because it's a very neat little power bank.

One of its standout features is the Quick Charge 3.0 Protocol which activates fast charging modes for compatible devices. This power bank has an LED indicator with four bars that let you know how full the charge is (25%, 50%, 75% or 100%). While some might prefer an LCD screen that shows exact charge numbers, we think the LED indicator is more than enough.

There are three different versions of BioLite's Charge power bank that are very similar in terms of specifications. The one we tested is the Charge 80, which has the largest capacity. It's rugged and simple to use, and in our BioLite Charge PD review, we noted that its size-to-capacity ratio is just right. It's able to charge multiple devices more than once over a couple of days — notably, it can charge the BioLite HeadLamp 425 (which features on our best headlamps for astrophotography list) approximately 16 times.

The Charge PD ships with a USB-A to USB-C cable, but you'll have to supply your own USB-C to USB-C cable or something with multiple ends for a more universal fit.

The power bank can operate in temperatures between -20C to 40C, so unless you travel to the most hostile conditions, you shouldn't run into any issues in that department. One major drawback is it's not waterproof, however, so you'll want to keep it somewhere dry and avoid venturing out with it in a downpour.

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Test Results

Attributes

Notes

Design

Simple, grey and yellow, rounded edges

Functionality

Not waterproof but robust, small and light

Performance

Great, does what you'd need it to inc PD which charges devices three times faster than a 5W charger.

Best value

Explore Scientific 8300mAh Power Bank with Red LED Flashlight

Best value: Made with the astronomer in mind, power your off grid all night skywatching sessions

Specifications

Capacity: 99.6Wh/ 8300 mAh
Output ports: USB Port 5 VDC, 2A 12 VDC, 6A
Charging time: 6 hours max
IP rating: None
Weight: 1.4 lbs (635g)

Reasons to buy

+
Operates in extreme temperatures
+
Designed with astronomers in mind
+
Red LED Flashlight built-in

Reasons to avoid

-
Charges one device at a time
-
Brick-like
-
No cables supplied
Buy if:

You'll be using it in extreme temperatures: It can operate in temperatures from -4 to 140F (-20 to 60C).

You want the red light functionality: Having a built-in red light is particularly useful for astrophotographers.

Don't buy if:

You want something that's quick to charge: Some power banks take less than two hours to charge to 100%, but this one can take up to six hours.

You want something pocketable: This power bank is brick-like and pretty heavy. You can find lighter models with higher capacity.

The bottom line:

🔎 Explore Scientific 8300mAh Power Bank with Red LED Flashlight: If you're heading out for a night of skywatching or astrophotography and require a red light and some extra power, this will serve you well.

The Explore Scientific USB Power Bank with Red LED Flashlight is a great choice for astronomers and astrophotographers. Not only does it have enough power to see you through night-long shoots, the red flashlight is also a great companion that will help you maintain your night vision.

Granted, it's not the brightest flashlight and it won't light up whole areas like one of the best headlamps for stargazing would. But as an additional feature to a power bank, it's very useful indeed, whether you're checking star charts or fiddling around with the settings on your camera.

The flashlight has a tactile toggle switch that you can use to turn it on and off. It also has a two-point attachment point so you can hang it from a convenient place, like your tripod frame. There are five LED indicators on the body that show you the amount of power it has left, so you won't get caught out unexpectedly.

This device definitely doesn't look as 'sleek' as some of the other picks in this guide, but it's covered in a thick layer of rubber armor that keeps out dirt and moisture while shielding the electronics from minor impacts. It can operate in temperatures from -4 to 140F (-20 to 60C), so there's no need to worry about protecting it from extreme temperatures.

Best for keeping in your car

Best for keeping in your car or camper thanks to its simple, compact design

Specifications

Capacity: 25,000 mAh
Output ports: 2 x USB-C, 1 x USB A
Charging time: 1.5 hours
IP rating: None
Weight: 1.13 lbs (513g)

Reasons to buy

+
Simple design
+
Has both USB-C and USB-A ports
+
FAA carry-on compliant

Reasons to avoid

-
Larger than comparable capacity power banks
-
Heavier than comparable capacity power banks
Buy if:

✅ You want something carry-on compliant: This is almost the maximum capacity power bank you can take in your hand luggage.

You need both USB-C and USB-A ports: This has both, so there is no need to carry an adapter with you.

You want something that charges quickly: During our tests, we charged this power bank from 0-100% in just 90 minutes.

Don't buy if:

You want wireless charging: This particular Ugreen model doesn't feature wireless charging, but some of te brand's other models do.

❌ You want something for carrying around in your backpack: This might not be the ideal power bank for you as it's on the heavier side.

The bottom line:

🔎 Ugreen 2500mAh Power Bank: We really like this power bank and wouldn't hesitate to recommend it as a simple, elegantly-designed, high-capacity and reliable model.

The Ugreen 25000mAh power bank is a simple but sleek-looking device with some impressively fast charging times. Its capacity is more than large enough for powering multiple devices, but it's also just under the maximum limit permitted for hand luggage, making it very travel-friendly. You get USB-C and USB-A ports on this device, as well as a USB-C to USB-C cable in the box.

During our Ugreen 25000mAh power bank review we were able to charge the power bank itself from empty to full in just 1.5 hours, and we charged a laptop from empty to full in the same amount of time.

One of our favorite features on the Ugreen power bank is the built-in digital display. It lets you see exactly how much power is left in it, which means there's no guesstimation involved unlike with with power banks that use light indicators instead. The level of precision is very welcome as it means you're able to keep careful tabs on your power usage, knowing exactly what you can still afford to charge.

The two-way charging featured on this model means that it can both charge and give charge at the same time, so it's an ideal charging hub for multiple devices. It also allows for trickle charging and has built-in surge and short circuit protection to give you peace of mind.

One thing to bear in mind is that this power bank is heavier than some other similarly-sized models. As such, it's not the best for carrying around with you, but it is very useful for keeping in your car or tent for charging devices as you travel. It would also have been nice to see a wireless charging feature, particularly as the Ugreen 25000mAh power bank's size would allow for it, but its absence shouldn't be too much of a deal-breaker for most.

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Test Results

Attributes

Notes

Design

Professional looking — stylish and fuss free with a digital power indicator

Functionality

USB-C and USB-A ports are useful, two way charging so you can use it as a charging hub

Performance

Incredibly fast to charge, real time information is accurate

Best for longer charges

Anker PowerCore+ 26800 with Quick Charge 3.0

Best for longer charges: A premium, colossal capacity power bank

Specifications

Capacity: 26,000 mAh
Output ports: 3 x USB Type A
Charging time: 4 hours
IP rating: None
Weight: 1.3 lbs (591g)

Reasons to buy

+
Huge capacity
+
A good choice for large devices

Reasons to avoid

-
Quite big and bulky
-
Definitely not cheap
-
No IP rating
Buy if:

✅ You want to buy from a well-known and respected brand: Anker is one of America's leading USB charging brands.

Don't buy if:

You need a fast-charging device: It takes around six hours to fully charge.

❌ You primarily charge USB-C devices: This power bank has three USB-A outputs and takes Micro-USB input.

The bottom line:

🔎 Anker PowerCore+ 26800 with Quick Charge 3.0: A product from a well-respected brand with the maximum capacity allowed in hand luggage, it intelligently delivers the optimum power to your individual devices.

Anker is a well-known USB charging brand in America, so we always feel confident recommending their products. The Anker PowerCore+ 26800 comes in a sleek aluminum design, with rounded corners and round battery indicator button surrounded by 10 small LED lights to help you keep track of how much charge it has left.

The Anker PowerCore+ 26800 features dual input ports, allowing it to halve the amount of time it takes to charge up at the wall, and it's also compatible with Qualcomm Quick Charge 3.0 technology to allow it to charge even faster — though you'll have to buy the wall charger separately to make use of this feature. With the additional wall charger, you can charge it from empty to full in around four hours, versus around six hours without it.

Measuring around 7 x 3 inches (18 x 8cm) and weighing 1.3 lbs (591g), it's a little bulkier than some of the other options on our list. That said, it could still be a worthy travel companion thanks to its high capacity, which falls just under the carry-on limit for airplane travel. It also comes with a handy carry case.

You can charge up to three devices at the same time with this power bank via the three USB-A ports. It also boasts another inbuilt piece of technology called Power IQ which allows the power bank to identify connected devices and deliver the optimum charging speeds to all devices at the same time. Overall, it's a solid and reliable power bank that comes with an 18-month guarantee for further peace of mind.

  • Need a camera backpack to carry your kit? Look no further than our handy guide.

Best for waterproofing

Otterbox Fast Charge Power Pack (15,000mAh)

Best for waterproofing: You can take this fast charging, rugged power bank with you in any weather

Specifications

Capacity: 55.5Wh/15,000mAh
Output ports: USB-C, USB-A, Qi Wireless 10W
Charging time: 4 hours approx
IP rating: IP54
Weight: 0.73 lbs (330g)

Reasons to buy

+
Durable with drop protection
+
Limited lifetime warranty
+
Supports wireless charging

Reasons to avoid

-
Basic LED power indicator
Buy if:

You want something waterproof: It has an IP54 rating, so it's not submersible but it would be fine if you left it out in the rain.

✅ You want wireless charging: This power bank offers wireless charging for compatible devices.

You want something pocketable: This is 140 x 73 x 22 mm, so it should easily fit in your pocket.

Don't buy if:

You need to charge your devices multiple times: This is a low-capacity power bank that should be seen as a spare supply of power in a pinch.

❌ You like seeing real-time data: This power bank only has a basic LED indicator for charge levels.

The bottom line:

🔎 Otterbox Fast Charge Power Pack: An extremely rugged and weatherproof power bank that offers wireless charging.

The Otterbox 15,000mAh (also available as 10,000mAh) is a reliable outdoor companion. With a protective rubber shell, it's very hard-wearing so it's a great power bank to choose if you're off on an adventure that may involve a few knocks (or if you're a little accident prone).

This power bank comes with wireless charging, which is very handy as it means you don't need to carry around extra wires and cables — providing your devices are wireless charging compatible, of course.

Its IP54 rating means it's totally protected from dust ingress and allows for some water ingress too. While it obviously isn't fully submersible, the odd splash or a bit of rain isn't anything to worry about, so it's good for use in most weather conditions.

The Otterbox comes in three colors: Twilight Black, New Blossom Pink and White Sands. The latter two make the device easier to spot among a sea of predominantly black photography gear, or if you're out on an astrophotography shoot in the dark.

Some might be disappointed that the Otterbox doesn't have a display, which means you don't get an accurate numerical depiction of how much charge remains in the device. Instead, there's a basic LED indicator which lets you know when it's charging and when it's fully charged.

Best for wireless charging