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Poseidon XL

Built to thrive where others quit, the Poseidon XL delivers uncompromising performance in the world’s harshest environments. With a 100 W USB-C input and output, it powers everything from laptops to a Starlink Mini. Whether you’re deep in the backcountry or off the grid entirely, this is the power source you trust.

Included in the box:
- Poseidon XL Powerbank
- 3ft 100W USB-C to USB-C Cable

Poseidon XL

Built to thrive where others quit, the Poseidon XL delivers uncompromising performance in the world’s harshest environments. With a 100 W USB-C input and output, it powers everything from laptops to a Starlink Mini. Whether you’re deep in the backcountry or off the grid entirely, this is the power source you trust.

Included in the box:
- Poseidon XL Powerbank
- 3ft 100W USB-C to USB-C Cable

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$249.99
$249.99
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Highlights

  • Largest airplane safe battery

  • IP68 waterproof and dustproof

  • 1.5 charges on a 13" laptop
    (27,000 mAh)

  • 4 fast charging ports

  • Powers satellite internet (2-3 hours)

  • 100W Solar Charging Port (XT60)

  • Backed by a 5 year Dark Energy Warranty

Specs

IP68 waterproof, fully submersible up to 6 feet for 45 minutes

Drop, crush & dust-proof — built to exceed MIL-STD-810G standards

27,000mAh lithium-ion battery provides 1.5 charges for a 13" laptop

100W input and output port for fast charging (20V/5A)

1 and 2 hour timer to conserve energy and prevent accidental overnight drains

Operates in extreme heat, cold, moisture, and elevation

Built-in voltage regulator and surge protection for safe charging

Compatible with laptops, satellite internet, phones, lighting equipment, cameras & more

Built-in LED charge indicators

2 USB-C input for fast recharging (5V/3A, 9V/2A, 12V/1.5A)

Rugged polycarbonate housing with diamond-texture grip and reinforced corners

Dimensions

Height: 8.35 in (47 cm)
Width:  6.2 in (16 cm)

Thickness: 1.61 in (4 cm)

Weight: 2.5 lbs (39.79 oz)

FAQ's

Q: When do I get my Poseidon XL?

A: Orders including Poseidon XL begin shipping 12/1.

Q: How long will it run my satellite internet?

A: 2–3 hours. You can run it indefinitely when paired with a Spectre 56W Solar panel on a sunny day. 

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Q: How do I reset the Poseidon XL?


A: Press and hold the reset button for 10 seconds until the lights flash.

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Q: What is the difference between this battery and others I can purchase for cheaper?


A: Cheaper batteries are generally not waterproof, shockproof, or built for extreme use, which might work for some people. Poseidon XL is engineered to survive in the harshest of conditions. 

Q: What comes with the Poseidon XL


A: In each box is a Poseidon XL and a 100W 3 foot USB-C to USB-C Cable

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Compare

Poseidon XL

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1.5 charges for a 13"  laptop (27,000 mAh)

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2 USB-C + 2 USB-A outputs + 1 XT60 Solar input

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IP68 waterproof & dustproof

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Power for Laptops

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H: 8.35 in 
W:  6.2 in

D: 1.61 in

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Weight: 2.5 lbs

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Poseidon Pro

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2–3 full phone charges (10,000 mAh)

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2 USB-C + 1 USB-A outputs

 

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IP68 waterproof & dustproof

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Power for Phones

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H: 6 in 
W:  3.25 in

D: 0.63 in

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Weight: 0.6 lbs

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Complete Your Power Setup

THE STANDARD FOR OFF-GRID RELIABILITY

PERFORMANCE FOCUSED

The Poseidon XL delivers 100 watts of output in a compact, TSA-compliant design—strong enough to power laptops, cameras, drones, and even Starlink Mini. It’s the new standard for field-ready energy.

PERFORMANCE FOCUSED

The Poseidon XL delivers 100 watts of output in a compact, TSA-compliant design—strong enough to power laptops, cameras, drones, and even Starlink Mini. It’s the new standard for field-ready energy.

SURVIVALIST RELIABILITY

In the backcountry or the battlefield, power isn’t optional—it’s survival. The Poseidon XL was engineered for extremes: fully submersible, drop-proof, and built to operate from –10°F to 120°F without losing charge. 

SURVIVALIST RELIABILITY

In the backcountry or the battlefield, power isn’t optional—it’s survival. The Poseidon XL was engineered for extremes: fully submersible, drop-proof, and built to operate from –10°F to 120°F without losing charge. 

OUR IDENTITY

Dark Energy builds power for the extremes—for people who don’t turn back when things get hard. The Poseidon XL represents everything we stand for: relentless performance, uncompromising strength, and the freedom to go further than ever before.

OUR IDENTITY

Dark Energy builds power for the extremes—for people who don’t turn back when things get hard. The Poseidon XL represents everything we stand for: relentless performance, uncompromising strength, and the freedom to go further than ever before.

Customer Reviews

Based on 33 reviews
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Ashley
Excellent Customer Service!

Besides the fact that all of Dark Energy’s products are great, their customer service is EVEN BETTER! Purchased two items that became faulty eventually, and Dark Energy replaced both with no hassle. Such a breath of fresh air when paying top dollar for things these days! Hoping to purchase their Solar Generator soon, as I feel confident in their warranty.

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Jesse

Definitely ready to test it on expeditions!!!

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Samuel

The thoughts of it is very valuable.

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Summerlynn
HIGHLY RECOMMEND

I’ve been using the Poseidon XL power bank for both everyday life and a recent camping trip, and it has honestly been a game changer. Whether I’m at home working on projects or out in the middle of nowhere, I don’t have to stress about my devices dying anymore.

I primarily used the Poseidon XL to charge multiple devices including iPads, an Apple Pencil, and several smartphones at the same time. It handled everything with ease, and I love that I can plug in multiple devices without noticing any drop in performance. I could also see this being incredibly useful for charging things like a laptop, camera gear, or even satellite internet equipment while traveling or off-grid.

The 100W USB-C output performed really well, especially for higher draw devices. It charged my devices quickly and consistently, which is something I’ve struggled with using other power banks in the past. Even when running multiple devices, the charging speed stayed reliable and didn’t feel slowed down.

In terms of ease of use, it’s very straightforward. The port layout is intuitive, and setup is basically plug and go. No complicated instructions or guesswork, which I really appreciate, especially when I’m outdoors and just want things to work.

Battery life has been impressive. I was able to get multiple full charges on my phone and tablet before needing to recharge the unit itself. During camping, it easily lasted through extended use, which gave me peace of mind the whole trip.

Durability wise, it feels solid and well built. It held up great during travel and outdoor use, and I’d feel confident taking it on future trips without worrying about wear and tear.

What really makes the Poseidon XL stand out compared to other power banks I’ve used is its combination of power, speed, and the ability to charge multiple devices efficiently at once. It’s powerful enough for serious use but still convenient enough for everyday needs.

If I had to mention any considerations, it’s a bit larger than smaller portable chargers, but that’s expected given the power and capacity. For me, the performance more than makes up for the size.

Overall, I’d highly recommend the Poseidon XL to anyone who needs a reliable, high capacity power bank for travel, outdoor adventures, or just daily use.

Disclosure: I received this product for free in exchange for my honest review.

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Scott B
Hunting/camping out of the truck

Worked great when not wanting to drain the battery and gas to have the truck running to charge devices. Rather than having the truck run i just used the Poseidon XL to charge phone and tracking equipment.