Shargeek, a Chinese accessory manufacturer, is doing great things on the charging front. I used the 25600mAh Storm 2 power bank for the better part of three months now and like it quite a bit: its unique see-through design with yellow accents makes it stand out from every other power bank, it has all the charging ports I need, and it goes up to 100W over USB PD.
The best thing about the Storm 2 power bank is its built-in screen which shows real-time charging statistics. It’s cool to be able see how fast your phone or notebook charges in real time. This feature is more important than the transparent design. Now, as much as I like the Storm 2, it is a little on the bulkier side (coming in at 579g), and I don’t need all the ports on offer.
(Image credit: Harish Jonnalagadda / Android Central)
That is where the Storm 2 Slim comes in. Shargeek used the Storm 2’s basic design but reduced it to a smaller size and eliminated some features like the DC port. The Storm 2 Slim features a 20000mAh lithium battery, one USB C port and one USB A port. It is also lighter, making it more convenient to carry on the road. The Storm 2 Slim is smaller and more compact than the Storm 2. This makes it easier to carry around the power bank in a bag. Coming in at 448g, it is also considerably lighter, and the plus side is that you still get a large 20000mAh battery here.
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(Image credit: Harish Jonnalagadda / Android Central)
(Image credit: Harish Jonnalagadda / Android Central)
(Image credit: Harish Jonnalagadda / Android Central)
(Image credit: Harish Jonnalagadda / Android Central)
Thankfully, Shargeek hasn’t changed two of its biggest differentiators: the see-through design and built-in screen. The Storm 2 Slim is even more beautiful with the lavender accents and the batteries in white. It looks much better than the Storm 2 Slim. This see-through design looks just as cool. You can see the circuit board, internal ICs and more.
The Storm 2 Slim’s acrylic outer shell allows for the same see-through design as the Storm 2. The Storm 2 Slim has an acrylic outer case that allows for the see-through design. I was initially concerned about its durability.
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(Image credit: Harish Jonnalagadda / Android Central)
(Image credit: Harish Jonnalagadda / Android Central)
(Image credit: Harish Jonnalagadda / Android Central)
(Image credit: Harish Jonnalagadda / Android Central)
(Image credit: Harish Jonnalagadda / Android Central)
Then there’s the screen: the built-in IPS panel does a great job showing real-time charging statistics, and continues to be my favorite feature on a power bank. You can also adjust the time that the screen stays on by using the onboard settings. The Storm 2 Slim’s USB-C port is responsible for charging, while the USB-A port connects accessories. Both ports work over the USB PD 3.0 protocol, with the USB-C port going up to 100W and the USB-A hitting 30W. What’s great about the Storm 2 Slim is that you get the full 130W power budget when using both ports simultaneously, so although it has one less USB-C port than the Storm 2, it delivers a higher net charge at 130W.
(Image credit: Harish Jonnalagadda / Android Central)
Before I talk about real-world use, here’s an overview of the power profiles:
USB-C: 5V/3A (15W), 9V/3A (27W), 12V/3A (36W), 15V/3A (45W), 20V/5A (100W Max)USB-A: 5V/3A (15W), 9V/2A (18W), 12V/2.5A (30W Max)USB-C + USB-A: 100W + 30W (130W Max)USB-C (in): 5V/3A (15W), 9V/3A (27W), 12V/3A (36W), 15V/3A (45W), 20V/3. 25A (65W)
The single USB-C port is used for both output and input (charging the power bank itself). It goes up to 65W for input, and you’ll need to wait just over 90 minutes to fully charge the 20000mAh battery. As for the output side of things, the Storm 2 Slim was able to effortlessly charge the best Android phones — including the Pixel 7 Pro, Galaxy S22 Ultra, and Galaxy Z Fold 4 — and it managed to deliver 100W of charge to the Xiaomi Notebook Pro 120G without any issues at all.
Shargeek bundles a yellow charging cable in the box with the Storm 2 Slim, and it works with the 100W USB PD standard, so you don’t need to buy anything else to get started with the power bank.
(Image credit: Harish Jonnalagadda / Android Central)
Overall, the Storm 2 Slim is one of the best portable power banks around: the 2000mAh battery is more than adequate to charge a phone and notebook a few times over, and it goes up to 100W over USB PD and an additional 30W over USB-A. Its slim profile makes it ideal for travel and its transparent design will impress. The best thing about the Storm 2 Slim is its built-in screen. It is easy to see how much battery is being charged to your phone or notebook in real time. And the novelty never fades.
The Storm 2 Slim debuted for $199, but it is retailing for $149 on Amazon (opens in new tab) right now. This is a great deal, considering the number of features and unique design. But the best thing about the Storm 2 Slim? It’s portability. This is my favorite power bank to take on the road and I don’t expect that to change anytime soon.
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The Storm 2 Slim is a great power bank. The 20000mAh battery is more than adequate for charging your phone a few times over, it goes up to 100W over USB PD, and you get a USB-A port with 30W charging. This portable power bank is a combination of a unique, transparent design and a screen that displays real-time charging information.