Today, a charger has become almost as important as the smartphone or laptop itself. We are used to the idea that the more powerful the charger, the larger and bulkier its body. However, the emergence of GaN (Gallium Nitride) technology has changed this approach.
What is GaN?
GaN is a modern semiconductor material that is gradually replacing silicon in power electronics. Thanks to it, engineers can create more compact and efficient power supplies that provide high output without excessive heat.
GaN in chargers
In traditional chargers, most of the space is taken up by silicon transistors and the cooling system. In GaN chargers, the GaN elements are transistors (switches) in both the high-voltage and low-voltage stages. They replace silicon MOSFETs and allow the switching frequency to rise to the megahertz range, which reduces the size of the transformer, filters, and the overall housing. This means GaN makes it possible to pack 65–100 W of power into a body that, just a few years ago, would typically be used for a standard 18–20 W charger.
Key GaN components in chargers:
- Power transistors (GaN FET, GaN HEMT)
- Rectifiers and synchronous switches
- Integrated circuits (GaN IC)
In other words, GaN is only the power part of the circuit that switches the energy. The result is a compact “brick” that delivers several times more power than its silicon counterpart. Such a charger easily supports modern fast charging standards — Power Delivery, Quick Charge, and others — and can simultaneously power a smartphone, tablet, and even a laptop.
RZTK GaN2 65W Review
The RZTK GaN2 65W charger with two USB-C (PD3.0) ports provides fast and efficient charging for your devices. Thanks to GaN2 technology, this charger is compact and lightweight, yet powerful.
Features:
- 65W power: Delivers fast charging even for demanding devices such as laptops, tablets, and smartphones.
- Two USB-C (PD3.0) ports: Allow simultaneous charging of two devices with Power Delivery 3.0 support, ensuring optimal charging speed.
- Compact design: With GaN2 technology, the charger is smaller and lighter, making it convenient for travel and everyday use at home or in the office.
- USB-C to USB-C 100W cable included: A high-quality cable that supports up to 100W ensures reliable and fast charging.
This charger becomes an indispensable companion for those who value speed, reliability, and stylish design.
Comparison of chargers
For clarity, it is enough to visually compare two chargers I have at hand:
- Xiaomi (MDY-08-EI) – 18W — a classic silicon model
- RZTK GaN2 (GAN2CW) – 65W — a modern fast charger from a Ukrainian manufacturer
Their bodies are almost the same size, so at first glance, they look similar. But once you hold them, the difference is obvious: the GaN charger is heavier. And this is natural — it delivers several times more power, has more complex electronics, and a more powerful transformer.
I also checked the weight to see how big the difference is.
This is where the real advantage of GaN shows: in a traditional design, a 65W charger would be much larger and bulkier. The technology made it possible to keep the body compact — almost at the level of the small 18W model — while providing three and a half times the power.
Conclusion
Comparing the standard 18 W Xiaomi charger and the 65 W GaN from RZTK highlights the main point: GaN technology does not make powerful chargers “light,” but it does make them compact and convenient. In the past, a powerful adapter took up half a bag, but now it is hardly bigger than a basic smartphone charger. This is critical for those who travel with a laptop, tablet, and phone: one small adapter can replace several different power bricks.
That is why GaN chargers are becoming the new standard: they combine mobility and power, save space in your bag, and save time during charging.
