There’s a reason it’s called a charging ‘brick’. It charges, and it’s honestly brick-shaped. Laptops and phones have gotten thinner in the past decade, but their chargers honestly haven’t. GaN technology changes that. I’ve sung praise for GaN chargers in the past, and I swear by the one in my laptop bag right now, which replaces 4 different chargers while being the size of a hockey puck. Now Rolling Square’s gone and made the GaN charger even smaller.
Holding the title of the world’s smallest 100W charger, the aptly named Supertiny is 65% smaller than Apple’s 96W charging brick, but packs enough power to fast-charge your laptop without breaking a sweat. At just 2 inches long and 1.38 inches wide, the Supertiny is as small as your Airpods case, fitting in your palm or even your pocket. It comes in three global plug formats (US with foldable prongs, EU, and UK), weighs between 100 and 115 grams depending on the variant, and packs a single USB-C port to supercharge your laptop. But pair it with Rolling Square’s inCharge Life 2in1 cable and you can now fast-charge your laptop as well as your phone together.
Designer: Rolling Square
$70 (25% off). Hurry, only a few units left! Raised over $672,000.
Gallium Nitride has been around since the 1990s, first used in LEDs and satellite solar cells, but it took decades for the tech to migrate into consumer charging. The advantage is straightforward: GaN produces significantly less heat than traditional silicon, which means you can push more power through a smaller chipset without needing massive heat sinks or bulky casings to prevent thermal meltdown. Silicon-based chargers lose a chunk of energy as heat, which is why your old laptop brick could double as a hand warmer after an hour of use. GaN flips that equation. It’s ruthlessly efficient, converting around 95% of the energy from the wall into actual charging power, with only 5% lost to heat. That efficiency gain is what allows Rolling Square to cram 100W of power delivery into a form factor that genuinely feels like it shouldn’t be possible.
The Supertiny measures 2 inches long on the US version with foldable prongs, 3.19 inches on the EU model, and 2.81 inches on the UK variant (the EU and UK versions come with fixed prongs). To achieve this ridiculously compact format, the company rebuilt the internal voltage transformer from scratch, optimizing how components align to reduce wasted space and lower operating temperatures. Advanced heat conduction silicon and thermal sheets route heat away from critical areas, and the exterior design plays a functional role too. The ribbed pattern running along the sides prevents your fingertips from making full contact with the surface when you unplug it after charging. Flat surfaces conduct heat directly to your skin, ribbed surfaces don’t. It’s a small detail, but it’s the kind of thing that separates thoughtful industrial design from spec-sheet engineering.
The charger outputs 100W max through its single USB-C port, with support for Power Delivery 3.0 and PPS (Programmable Power Supply) that adjusts voltage between 3.3V and 21V depending on what your device needs. That means it’ll fast-charge a MacBook Pro, a Dell XPS, a Lenovo ThinkPad, or any other USB-C laptop at full speed. In case you’re wondering, yes, it can handle e-bikes and e-scooters too, albeit at 100W. For phones and tablets, it delivers fast charging across iPhones, Samsung Galaxy devices, Google Pixels, and pretty much anything else with a USB-C port. The lack of multiple ports is deliberate. Rolling Square designed this charger for people who want maximum power in minimum space, and adding extra ports would have inflated the size.
If you need to charge two devices simultaneously, Rolling Square offers the inCharge Life 2in1 cable as an optional add-on. This modular cable splits the 100W output intelligently between two devices, letting you charge your laptop and phone together from a single power source. The cable stretches 1.5 meters (about 5 feet), features a durable nylon braid reinforced with aramid fiber, and uses premium metal connectors built to last. Rolling Square backs it with a lifetime replacement guarantee: if the cable ever fails, you submit a short video showing it fully cut along with your order number, and the company ships a replacement immediately. No returns, no forms, no hassle.
Rolling Square is a Switzerland-based company that’s been refining everyday tech problems since 2014, starting with the original inCharge keyring cable that packed multiple charging connectors into a tiny form factor you could attach to your keys. The company followed that up with the AirCard wallet tracker, the TAU keyring power bank, and a lineup of modular MagSafe accessories under the EDGE Pro branding. The Supertiny is their 19th product launch, and it fits the company’s design philosophy cleanly: solve one specific problem extremely well, make it as small as physics allows, and build it to last. Rolling Square products tend to be the kind of gear you don’t notice until you need them, at which point you wonder how you ever lived without them.
The Supertiny 100W GaN Charger comes in three versions: US, EU, and UK plugs. Early pricing starts at $46 for a single unit, or a $68 bundle that also includes the inCharge Life 2in1 cable. Rolling Square is shipping the chargers globally starting in May 2026, and all three versions carry full international safety certifications including TUV Rheinland. The company backs the product with a two-year warranty and a 30-day return policy. I touted GaN chargers as a tech must-have in 2025, so if you’re reading this now and you still don’t own one, take it from me. You, your cluttered workdesk, and your heavy laptop bag will thank me.
$70 (25% off). Hurry, only a few units left! Raised over $672,000.
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