Shargeek Storm2 and Storm2 Slim hands-on review. Storm power bank

Shargeek Storm2 and Storm2 Slim hands-on review

Shargeek has scored a crowdfunding hit with its Storm2 power bank and its Slim variant. Their appeal is based on their transparent design; however, beyond that, they purport to deliver on high-wattage charging via their visible lithium-ion batteries. Is it all just for show, though? We will also see what the OEM’s first-gen Retro power brick has behind its nostalgic charms.

With clear shells showing a board that put an array of fascinating-looking internals on display, the Shargeek Storm2 and Storm2 Slim look like a tech fan’s dream. However, can they and their power bank functions live up to the resulting expectations?

Unboxing and First Impressions

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Interesting, functional-looking capacitors and chips, a full-color display purporting to show its precise input and output, lots of different ports: the Storm2 seems to have it all. They are on view on the board stacked on top of its batteries. You can even see the circuit traces between the various components: there’s a lot going on.

Much the same can be said for the Storm2 Slim, although it has different 18500 batteries that go better with its white accents. Shargeek is almost patently looking to out-Nothing the Nothing phone (1) with this one.

Its batteries have 72 watt-hours (Wh) of rated capacity, with 93.6Wh for the Storm2. also clearly on show thanks to the batteries visible through the power bank’s clear plastic chassis.

The larger version is rated to be able to charge devices at up to 100W (20V/5A) via USB type-C. There is also a less powerful second type-C port and a type-A port. however, the Storm2 stands out due to its inclusion of a DC input as well.

The Storm2 series also distinguish themselves with IPS displays with a read-out supposedly controlled by its own Energy Storage Management (or ESM) OS (v1.0). The screens are well-populated with charging info in volts and amperage to 2 decimal places (which I found only more or less in keeping with those of my usual USB multi-meter), yet seem intuitive enough.

They are also reversible. which is often handy.

There are also menus navigated through and interacted with through long- and short presses of the Storm 2 series’ single physical button alone.

They are identical on either variant. except for the extra page of DC controls on the Storm2, which allow the user to tune that output based on the requirements of a given device.

Charging Tests: Storm2

It works as advertised, too, powering a portable generator that is quite picky about the chargers with which it will work.

The DC port also works as an input, albeit about half as fast (~44W) as that of the 100W USB type-C port. also, it should be noted that it is a 5.5×2.5mm input, for which my power supply needed an adapter. just a good thing I had one around.

It should be noted that using this method results in some excruciating high-pitched buzzing (practically beeping) noises, albeit not for too long, lasting while the Storm2 charges from about 7 to 17% and then abating completely.

the Chargeasap Flash Pro, and both power banks also take about as long to charge.

The 100W port is also intended for use as an output, and is compatible with a laptop capable of charging at 20V/5A via USB type C.

I did often find that I had to connect and re-connect the Storm2 to a Razer Blade Stealth a few times over to get its top rates out of it and avoid the dreaded Power Required system pop-up. however, once it got going at what I’ve come to think of as normal service with power banks, even those touted as ultra-fast-charging. This means it goes at ~55W, dropping to ~40W over time with peaks at ~63W, until it tops the laptop up by 75% to 90%, taking ~72 to 92 minutes to do so, depending on what I’m doing at the time.

On that note, the power bank has exhibited a tendency to emit piercing buzzing or whining noises under severe load. such as when you’re gaming on said laptop and have forgotten which charging method you’re using. It has also gotten the hottest it has gotten so far (~56°C, although not for long enough for me to get it on camera) while doing so. albeit not dangerously so.

This happened most often when using an official Razer braided cable rather than the one from Shargeek.

The Storm2 is also rated for pass-through charging using its 100W type-C port as an input and the other one as an output. I found that it worked.

unless the power bank was at very low battery levels itself.

Thermal Tests

The Storm2 series also integrates battery and chip temperature readings among their read-outs.

Comparing them against FLIR imaging did not get anything close to exact matches from any angle, suggesting that either the sensors taking the power banks’ readings are not on show, or they are inaccurate in some way.

Suffice it to say I detected multiple hot-spots on both power banks in all tested use-cases, but couldn’t find measurements that conformed 100% to the figures on-screen. In fact, the most accurate readings came from under the accessories’ displays. where no chip is visible.

Charging Tests: Storm2 Slim

The smaller power bank of the 2 is also capable of performance as expected, even with a 100W ultrabook. In fact, its charging curves may have gone better, possibly thanks to its lower capacity. Then again, it is obviously not quite capable of filling a PC’s battery to 100%.

The Storm2 Slim could also power a Galaxy S22 Ultra (that I’ve had to use while my Note 10 undergoes repair), albeit not at its top 45W rate.

One day, I’d like that to actually work. It would charge at up to ~35W, albeit mostly at the start of its charging cycle and not for long.

It also has a type-A port that can handle anything thrown at it.

Design Build Quality

It is inevitably all about looks with the Storm2 and Storm2 Slim, given their design. It is, therefore, just as well both accessories ship with their own little drawstring bags.

I’m normally never inclined to use extras like those, although I’d have to make an exception in carrying either power bank around to prevent scuffs or marks on the clear polycarbonate. much of the point of them is that they are see-through, after all.

I also worry about their discoloring over time. This, weirdly enough, seems to be happening quite early on with the Storm2 Slim: it has developed faint milky streaks along both sides of its upper surface, and I can’t get rid of them.

They seem to be on the inside of the plastic, and I’m not sure how they formed. the external plastic still seems completely sealed. although the regular changes in internal temperature may not have helped. Then again, the Storm2 has yet to acquire a noticeable mark.

Retro 35W GaN Charger

These review units came with a fun Easter egg: a power brick! That might not sound like much, although this one has been molded to look like an old-school PC, floppy-disk drive slot and all.

It is finished in an authentic-looking off-gray color, and even its indicator light is disguised as its “display”. Shargeek have thus put a lot into trying to make it fun for all, especially with the multi-region adapters for its downward-facing (relative to the form-factor) US-compatible prongs that come in the box.

However, that is also a potential disadvantage for those in the Republic of Ireland or United Kingdom: with the adapter on, it only faces one way, so when it is plugged into the almost invariably wall-mounted socket, well.

Therefore, it needs an upward-facing socket or adapter to get the best out of it and its happy little classic emoji face. It is located on the screen, which can be customized with the stickers Shargeek includes in the box (I am most drawn to the panda these days for some reason).

However, on that note, there is no space for a cable in its box, presumably because it can be bundled with a Storm2 Slim.In terms of its function, it delivers power to different devices compatible with its type-C port (located on the top of the “monitor”) and its charging profiles.

Accordingly, it achieves standard results with an S22 Ultra, iPhone 13 Pro and various accessories, changing “display” colors as outlined in its instructions without getting even slightly hot.


Overall, I do quite enjoy using the Storm2 power banks. I’ve found they get results comparable to others I’ve tested with similar specs, in terms of charging rates and times for the devices in my usual rotation. Then again, their potential for cosmetic damage does still worry me, and I wish the display’s readings had proven a little more accurate.

Other power banks do have more ports, however, which is a particular disadvantage for the Slim variant. The selling point of a DC port as a back-up would be more useful had the Storm2 been shipped with compatible cables, to be honest.

Besides that, the Storm2 series is arguably better for travel than the heavier and more metallic Chargeasap Flash Pro: even the larger Storm2 beats it in terms of footprint and weight, despite having the same rated capacity.

The only other major negative point arises from the worrying noises the Storm2 is capable of making: I am now a little more careful about how I use it with high-voltage devices. Then again, the onset of serious battery failure or instability would be easier to spot in its case.

Overall, I’d be happy to travel with either Storm2 power bank (so long as I have their own cables to hand), even though the Slim is obviously marketed as the more portable. then again, I haven’t been in a position to test their alleged ability to get through an airport. If you want to try flying with them, they are available on or Amazon for US199 to 229 at present.

As for the 35W GaN charger, it might work best for those looking for something that could be a desk toy as well as a power accessory – particularly as it launched at US59.99. Then again, I do appreciate that it never seems to overheat and acts to compensate for my non-existent iPhone charger.

Also, with the adapters, I could conceivably travel with it (presuming I didn’t need to do so with a laptop). However, unfortunately, I find it harder to recommend in the face of the new 67W alternative.

Disclaimer: The author of this review received this item from Shargeek free of charge for the purpose of testing.

Shargeek Storm2 Slim power bank review – It’s fast, it’s small, it’s … clear!

REVIEW – How the new Shargeek Storm2 Slim power bank compare to a wall outlet with USB ports? Let me explain. Recently, I replaced two outlets with ones that had built-in USB ports. My thinking was that I could use these outlets to charge my devices without needing an adapter. While the thinking was correct, I didn’t realize how underpowered these wall USB ports can be. It takes seemingly forever to charge anything—especially if I’m in a hurry.

shargeek, storm2, slim, hands-on

That’s where portable charging devices come in handy. I discovered that I can (slowly) charge a portable power bank like this Storm2 Slim and use that for my quick charging. Then I just return it to the outlet for charging while not in use. It seemed like a good plan. Was it?

What is it?

The Shargeek Storm2 Slim is a slimmer version of the (slightly) more powerful and slightly more expensive Storm power bank. The Storm2 Slim is thinner and easier to carry around. It has both a single USB A and USB-C ports (vs the Storm’s 2 USB-C, USB A, and DC ports). No matter—the lighter Storm2 Slim’s form factor makes up for it.

The Shargeek Storm2 Slim power bank comes in a transparent case that shows off all the electronic guts consisting of a long and narrow circuit board attached to four lithium-ion (Li-Ion) batteries. A small IPS informational screen sits along the side, next to a single white multifunction on/off button that navigates the screen while showing all the info you would ever want—even if the type is too tiny for my eyes.

A canvas bag and a yellow USB-C cable are the only accessories offered.

Design and features

First, this is one cool-looking charger. It would be nice even if it came in black, but this transparent case just looks way better. It’s the kind of gadget that will grab people’s attention.

It’s a comfortable size for holding and carrying. The plastic exterior is slick but still grips easily. Previously, I’ve used all-aluminum power banks that always felt slippery and didn’t provide a lot of confidence when holding.

Four lavender-colored Li-Ion batteries sit next to a slim circuit board that houses the two USB ports, IPS screen, and on/off button. It’s a simple, yet functional layout—until you try to read the Shargeek Storm2 Slim power bank’s built-in screen.

Maybe I’m old, but the text on the IPS screen is small, as in T I N Y. I usually need to use a magnifying glass to read the text. It’s a shame because there’s so much useful information packed into the micro-screen. If only I was 20 again …

Shargeek calls the displayed info EMOS (Energy Management OS 1.0). The screen shows two “levels” of information accessible by either long or short pressing of the on/off button. The first level has five information groups all showing on one full-color screen:

  • Port status – Tells you which port is connected
  • Input status – Displays input info, such as charging voltage, charging current, and charging port.
  • Output status – Displays output voltage, current, and the output power of a specific port.
  • Battery information – Shows current battery life, battery voltage, and current. The icon can be seen in 4 color percentages of life left in the battery.
  • System status – Battery, circuit board temperature, and system running time are displayed.

The second level changes to a one-color screen that displays 7 separate items:

  • Output parameters
  • Battery Pack info
  • Configure temp info
  • Reset system run time
  • Display settings
  • Power off
  • Exit (return to top-level)

Still with me? This is just an overview. It can be a bit confusing, but the info is there for those who want to access it. You can easily spend 30 minutes perusing all the info shown on the screen.

Connecting the Shargeek Storm2 Slim power bank to any gadget is the same as any other charger. The Slim is small and light enough to throw into a backpack and forget it’s there—until you have to charge a device.

The Storm2 Slim’s large 20,000mAh capacity can charge a smartphone up to 4 times, a laptop or tablet up to 1.5 times, and DSLR camera up to 12 times. It takes 90 minutes to be fully recharged. Those aren’t life-changing numbers, but it’s enough to get you through a full day should you need that extra oomph—and look good, too!

Final Thoughts

The Shargeek Storm2 Slim is a handy and useful power bank. The included canvas pouch offers good protection and its strap makes carrying easy. The USB-C cable length is more-than-adequate for any charging situation. It’s one of the more useful power banks I’ve come across. Solid construction should bring years of dependable use. Now, where’s my magnifying glass?

Price: 199.99 Where to buy: Shargeek and Amazon Source: The sample of this product was provided by Shargeek.

What you need to know

I will be the first to admit that portable chargers, while extremely useful, are typically not the things I like to review. They are usually metal slabs with some specs that may (or may not) impress you with an expected price tag.

That is why when I got the chance to sample this Storm 2 charger, I took the opportunity. After all, it is see-through, and it has an LCD. I am a simple tech guy, so yes, these things intrigue me.

Here’s what else you need to know about this sci-fi-looking battery bank.

Storm 2 Liquid: Specs and features

The Storm 2 is a 99.36 WHr portable battery. That number should mean something to you as it is just a hair below what you are legally allowed to carry on airplanes making this ideal for the traveling tech nerd.

As is evident, the most striking feature of Storm 2 is the see-through chassis that lets you see the Panasonic lithium-ion batteries, 32-bit M3 ARM MCU chip, and the TI BQ40z50 coulombmeter (of course, you knew what those were).

PowerBatteryPortsDisplayFeaturesLifespanRecharge timeSizeWeightMaterial
100W PD In/Out3.3-25.2V DC OutPass-through charging
27,600mAh/99.36WhPanasonic-Sanyo NCR18650GA
2x USB Type-C (100W, 30W)1x USB Type-A (5V)1x DC Output (3.3-25.2V/3A)
Airline Safe Compact Battery BankRetro Style MonitorManual Power ControlVoltage ProtectionShort Circuit, and Temperature Protection
500 charges
1.5 hours
151 x 46 x 59 mm
578 grams
Aluminum Alloy/V0 fireproof chassis

The see-thoroughness serves no purpose other than aesthetics, but you must admit it looks very DIY. The company notes that this case and batteries are approved by Tesla and a V0 classification Fireproof PC Chassis. It should be safe, especially when combined with the protection for voltage, short circuit, and temperature abnormalities.

But it is that 1.14-inch IPS TFT LCD window that’s intriguing. The mini-OS is powered by a 32-bit M3 ARM MCU, and it lets you visualize battery life, charge cycles, output distribution per battery cell, running temp, and DC voltage adjustment. The display can be left on all the time or turn off after a specific duration. You can manipulate the battery’s settings via the single yellow button and a combo of short or long pushes.

Storm 2 Liquid: How is it?

I’ve had the Storm 2 for about a week now using to charge everything from my various smartphones to laptops. With the 100-watt output via Type-C, the charger can handle everything but gaming laptops (which require much more power due to GPUs).

The output is dynamic when a laptop is in use, and it is rather neat to see it fluctuate based on demand. The Razer Book 13 could draw 80 watts of power in performance mode, more than its typical 65-watt charger would allocate. It’s that ability to see what is happening when plugged in (versus blindly assuming output) that makes Storm 2 different from everything else.

Shargeek Storm2: The Ultimate Cyberpunk Power Bank

Want to recharge your portable devices anywhere with a stunning power bank that looks like it escaped from the USS Enterprise-D? You’re in luck.

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Shargeek STORM2

Lightweight and small enough to carry, the Shargeek STORM2 looks amazing and can recharge to all four ports simultaneously. The Energy Management OS meanwhile makes it easy to check on the performance of each cell and how long connected devices have until full charge.

The lack of additional USB cables and a power adapter is disappointing, but this is a power bank that can recharge almost any portable device, from drone to action cam to laptop, or even a portable console like the Steam Deck.

  • Four output options
  • Small and lightweight
  • Cyberpunk design with sci-fi display
  • Energy Management OS
  • Brand: 21700 Lithium-ion
  • Battery Capacity: 20000mAh
  • Ports: 1x DC, 1x USB A, 2x USB-C
  • Weight: 450g (0.99lbs)
  • Dimensions: 156 x 65 x 30.4 millimeters
  • Input : DC, USB-C
  • Wireless Charging : N/A
  • Capacity: 4x simultaneous devices
  • Voltage: 5V-20V
  • Looks amazing
  • Can take it anywhere
  • Star Trek: The Next Generation-esque display
  • Charges almost anything
  • Not enough cables
  • No DC charge option
  • No power adapter
  • Display font not wholly ideal for the size

While smartphone batteries tend to last longer than they did, the chances are you’ve been caught short. Slow, bulky portable battery chargers are an option, but they’re usually pretty dumb, with little more than an LED to tell you they’re fully charged.

What if you had a portable battery that gave you all the information you needed about its charge, the device it is charging, and also looked pretty unique in the bargain?

The Shargeek STORM2 is a cyberpunk-style power bank that lets you power and recharge almost anything with a USB port.

Note: All Shargeek products will be 20% off on October 11th and 12th, via Amazon or the official website! No code needed.

Why Use a Portable Battery Charging Device?

Over the years, power banks have become increasingly portable. These days, they’re small enough to slip in a bag or deep. and can offer multiple recharges.

Sure, you could just use your devices sensibly and recharge them when you’re asleep, but who wants to do that?

After all, using some devices means that they’re going to run out of juice before you get them back home. While that is less likely to happen with phones, what about tablets, earpods, or even portable game consoles?

With a portable power bank you can be reasonably confident that you’re not going to be left out of power. Just make sure it is charged and take it with you.

What’s in the Box?

Arriving in a modest black box, the Shargeek STORM2 is bundled with a tote bag, and yellow USB-C to USB-C charging cable.

While sporting a DC input, the power bank doesn’t ship with one, so you’ll have to source your own. (See below for specs). Fortunately, it can also be charged through a dedicated USB-C input. This means that the power bank must be charged using a suitable USB power supply. It will work with older USB adapters, but for the best results you need something compatible with fast charging protocols.

The meter-long USB-C charging cable feels heavy-duty, good enough to last at least as long as the STORM2 itself. Sadly, this is the only cable included with the device, which is a bit disappointing.

The Shargeek STORM2 Looks Amazing

Unboxing the Shargeek STORM2, I was immediately drawn to its design.

It sits in a transparent case, with a sizeable proportion of the electronics on show. This elevates the power bank above the average portable recharger, giving it a more industrial feel.

Once powered on (everything is controlled via that yellow button), the display is immediately evocative of the design language seen in Star Trek: The Next Generation’s LCARs operating system. This is referred to as a sci-fi display screen and rightly so.

That futuristic, colorful user interface might not be touch-sensitive, but offers enough to offset the visible inner workings of the STORM2. Whether laying on its side or standing upright, the Shargeek STORM2 is easily the most striking power bank I’ve ever seen.

Let’s be honest, these devices are usually pretty dull; this one completely rewrites the rules.

Using the STORM2’s Energy Management OS

As noted, the futuristic display is provided to help you charge your devices. This is controlled via that single yellow button, and is your interface with Energy Management OS (or EMOS).

The colorful Star Trek-inspired interface can be cycled through with a quick press of the button. Here, you can switch between the main user interface (referred to in the guide as the “top GUI”) and the other options (the “second-level GUI”).

So, the top GUI displays a summary of everything else, such as voltage, current, power, and temperature for each port, input and output status, and battery power and temperature status.

In the second-level GUI, meanwhile, you can configure DC output, view battery information, temperature display configuration (between Celsius and Fahrenheit), set a timer to view the charging time for specific devices, configure the display sleep time-out and orientation, power off, and exit to the top GUI. Each option you attempt to change is accompanied by a warning box, explaining the consequences.

Shargeek should be applauded for EMOS. It’s the first time I’ve seen such an OS on a power bank, and it’s surprisingly easy to use. Although the font on the main battery icon is a little light (a bolder font would have helped), it’s otherwise perfect. The wide use of colors in this view helps relay the necessary information and while the second-level screens are monochromatic, it is simple to discern what you need to know.

shargeek, storm2, slim, hands-on

Shargeek STORM2 Battery Device Specification

Inside the see-through case are eight 3200mAh (25600 mAh in total) lithium-ion high-capacity Samsung battery cells. These are mounted on power management circuitry with four ports for charging and recharging your devices.

Power input (for charging the STORM2) is via either DC5525 input or USB-C. Both are dual-purpose, capable of power output mode with the correct cables. DC output is adjustable, from 3.3 to 25.2V.

Meanwhile, there is a second USB-C port and a single USB-A port. The dedicated USB-C output port handles 100W and the PD 3.0 (PPS) Fast-Charging protocol. Where this is supported by other devices, the STORM2 can recharge mobile devices far quicker than you would expect.

The Shargeek STORM2 is also airline safe. This means that it passes the rules for taking it with you on a flight.

How Portable Is the Shargeek STORM2, Really?

Weighing in at 450g, the STORM2 is helpfully designed so that it can be easily carried. You can walk around with it in your hand, slip it into your backpack, keep it in the car door. maybe even squeeze it into a handbag.

shargeek, storm2, slim, hands-on

It’s not too dissimilar in shape and size to a single 1kg hand weight. We took it away for the weekend to keep our mobile devices charged and the STORM2 did exactly what it needed to do, and we didn’t even use 50% of its full charge. In short, it’s ideal for any situation, whether standing in the corner of your desk, laid in a drawer, whatever.

You probably wouldn’t want to take it out in the rain, though.

What You Can Charge and Power With the Shargeek STORM2

Shargeek claims you can charge various devices multiple times with the STORM2. A single charge is designed to charge an iPhone up to 7 times, an iPad up to 2.5 times, and a MacBook up to 1.2 times. Drones, GoPros, and other USB-compatible DC devices can also be charged.

My own testing involved a set of USB-micro headphones, a USB-C phone, a USB-C tablet, and my Steam Deck. All of these were recharged (some of them more than once) from a single charge. In fact, it wasn’t even a full charge of the STORM2, as out of the box it was at around 86%.

There are of course things that you can’t charge. If your notebook doesn’t have a USB to lightning port or isn’t capable of receiving power over USB-C, then naturally this isn’t an option for you.

I haven’t been able to test the DC-out functionality of the device. This would require specialist DC-to-DC cabling which I don’t have.

How Many Recharges Can You Get From a Single Charge?

Charging stuff up, in reality, is a bit different to what is advertised. Quite simply, with a portable, handy device like the STORM2, you kind of want to take it almost anywhere. Within hours of arrival the device has become a fixture in the car, recharging my three children’s tablets and earpods individually and in some cases, at the same time.

Take the STORM2 Anywhere and Power All the Things

Easy to carry without feeling lightweight or flimsy, the Shargeek STORM2 has a striking post-industrial cyberpunk look with a mesmerizing (if tiny) science fiction display. When you’re not charging your gear, you’ll find it hard not to cycle through the options in EMOS.

Honestly, charging things shouldn’t be this much fun.

shargeek, storm2, slim, hands-on

There is a slight downside to the STORM2, however: the lack of a PSU and any additional cables. Shargeek sells power adapters, but its cheapest is more expensive than an iPhone adapter. Just one more cable – perhaps a DC to DC – would have been useful in the absence of a PSU for charging.

That aside, the STORM2 is the best way to charge your gear, whether at home or on the go.

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