I have been on the road for 413 consecutive days as of this writing. My office has been a rattling train in Vietnam, a creaky Airbnb in Lisbon, and an airport floor in Chicago. In that time, I have learned that weight is pain, clutter is anxiety, and dead batteries are a crisis. A good multi-port GaN charger helped me a lot.
When I first started traveling, my “tech pouch” looked like a bomb disposal kit. I had the massive, hot-to-the-touch brick for my 16-inch laptop. I had the smaller, yet still annoying, cube for my phone. There was a dedicated, underpowered puck for my noise-cancelling headphones, and a separate USB hub for my power bank and e-reader. Four outlets. Three cables. Two adapters. One massive headache.
Then, about six months ago, I threw it all in a drawer and never looked back. The reason? A small, grey, unassuming rectangle of futuristic alloy: my Trunker 100W Multi-Port GaN Charger.
If you travel, you need to understand why Gallium Nitride (GaN) has just killed every other charger in your bag. Here is the breakdown of my loadout, and why this specific piece of tech is the new king of the road.
The Nightmare of Legacy Tech (Copper and Iron)
To appreciate GaN, you have to understand the physics of the old world. Traditional chargers use silicon. Silicon is great, but it hits a physical limit: heat. When you try to push 65 or 100 watts through a tiny silicon chip, it melts. So, manufacturers had to make the chargers big. They filled them with heavy heat sinks and transformers. That is why your old laptop charger feels like a doorstop.
For a traveler, that bulk is a liability. Every gram counts when you are hiking to a hostel up a cobblestone hill in Medellin. Furthermore, the heat generation in silicon chargers is wasted energy. In a humid Bangkok hostel, that heat just makes your room stickier.
Enter Gallium Nitride (GaN) . This is a semiconductor material that operates at far higher temperatures and higher frequencies than silicon. Because it handles heat better, the components can be placed closer together. The result? A charger that delivers twice the power, in half the size, with almost no heat waste.
My Current Travel Setup: The Holy Trinity
Before we dive deep into the ports, let me list what I charge every single night:
- Laptop: MacBook Pro 14” (Requires ~67W for fast charge).
- Phone: iPhone 15 Pro Max (30W peak).
- Audio: Sony WH-1000XM4 (15W).
- Reading: Kindle Paperwhite 5 (5W, charges once a month).
- Backup: Anker Power Bank (20,000 mAh, requires 30W to fill quickly).
Old way: 3 chargers, 3 outlets, 3 USB cables. In a European hotel room with only one working outlet? I was choosing between working and calling home.
New way: One 100W GaN charger. One wall outlet. Three ports out for USB-C cables.
Why the “Multi-Port” is the Real Genius
A single-port GaN charger is fine. You can buy a tiny 30W GaN brick for your phone. But the multi-port variant is the holy grail.
My specific charger has 2 USB-C ports and 1 USB-A port. But the secret sauce isn’t the number of holes; it is the Dynamic Power Allocation.
Here is where most cheap chargers fail. A cheap multi-port charger just splits the power in half. If it is a 65W charger, Port 1 gets 30W, Port 2 gets 30W. If you plug a laptop into a 30W port, it won’t charge; it will just slowly die while you work.
A good Multi-Port GaN charger has a brain.
Let me walk you through a typical evening in my life:
- 9:00 PM (Airport Lounge): I plug my laptop into Port 1 and my phone into Port 2. The charger’s internal chip detects the laptop needs juice. It dynamically gives the laptop 65W and the phone 15W. My laptop goes from 10% to 50% in 30 minutes. My phone trickles up slowly.
- 10:00 PM (The Hotel Room): I unplug the laptop (it’s full). The charger instantly reallocates. Without me touching anything, it now sends the full 65W to my phone. My phone hits 80% in 20 minutes.
- 10:30 PM (Bedtime): I plug in my headphones and power bank. The laptop is done. The phone is done. The charger says, “Ah, low demand,” and splits the remaining 30W between the tiny devices.
This is called intelligent power distribution. You do not need to remember which port is the “fast” one. You do not need to unplug and replug to reset it. The GaN chip does the math for you.
The Heat Test (Real World Data)
I am currently writing this in a 35-degree Celsius (95°F) afternoon in Cambodia. There is no air conditioning. My old silicon charger would be too hot to touch after 10 minutes. I have burned my fingers on metal USB plugs before.
I have had my 100W Multi-Port GaN charger running for three hours. It is driving my laptop (via a 100W cable) and my phone. I just touched it. It is warm, like a coffee cup that has been sitting for 20 minutes. I can hold it in my palm indefinitely.
Why? Efficiency. Silicon chargers operate at about 80-85% efficiency. GaN chargers hit 94-96% efficiency. That 10% difference isn’t just about saving electricity; it is about safety. In humid climates, a cooler charger is a safer charger. I sleep easier knowing the thing plugged in next to my bed isn’t a fire hazard.
Solving the “Global Citizen” Problem
I am a voltage nerd. Most modern chargers accept 100-240V (global standard). But the physical plug changes.
My Multi-Port GaN charger solves this elegantly. Because the brick itself is so small (roughly the size of a pack of playing cards), it is light enough that I can use a cheap, lightweight “universal travel adapter” without the whole assembly falling out of the wall.
In Italy, I had a heavy silicon brick plus an adapter. The weight of the brick would cause the adapter to droop and lose connection. I would wake up to a dead phone.
With the GaN brick, the weight is so low that it sits flush against the adapter. It stays in the wall. I have used it on shaky trains and in old, loose outlets in the UK. Gravity is no longer my enemy.
The “One Cable” Myth (Beware!)
I have to add a warning here, because many travelers get this wrong. Buying a GaN charger is step one. Step two is cables.
You can have a 100W GaN charger, but if you use the skinny black cable that came with your $10 earbuds, you will only get 15W. The cable is the pipe; the charger is the pump. You need a 100W USB-C cable (usually marked with “5A” or “100W” on the connector) to actually use the power.
I carry three cables:
- One 100W rated USB cable (1m): For laptop and phone fast charging.
- Two standard 60W cables (2m): For headphones and power banks (they don’t need speed, they need reach).
The GaN charger is smart enough to talk to the cable. If you plug a 100W cable into the laptop port, it sends 100W. If you plug a cheap cable in, it throttles down to 15W to prevent a fire. Smart.
How to Choose Your multi-port GaN Charger Companion
If you are buying one today, ignore the brand names for a moment. Look at the numbers. Here is my cheat sheet based on 400+ days of use:
A: The Minimalist (30W-45W)
- For: Phone, earbuds, power bank, tablet.
- Don’t: Do not buy this if you have a laptop over 13 inches. It will charge your MacBook Air slowly, but if you use it while plugged in, the battery will still drain.
- Verdict: Good for weekend trips. Bad for digital nomads.
B: The Sweet Spot (65W) Multi-port GaN Charger
- For: 13-inch laptops (MacBook Air, Dell XPS 13), phone, tablet.
- Reality: If you plug a laptop and a phone in, the laptop gets ~45W. That is enough to run the laptop and charge it slowly. This is perfect for 90% of travelers.
- My take: The best price-to-performance ratio.
C: The Heavy Lifter (100W-140W) – My Choice
- For: 14/16-inch MacBook Pros, gaming laptops, or charging a laptop + iPad + Phone simultaneously at full speed.
- Reality: It is slightly larger than the 65W version, but still 1/3 the size of the original Apple 140W brick.
- Why I love it: Headroom. On a long train ride, I can charge my laptop from 0% to 100% in an hour while charging my phone and power bank.
The Verdict: Minimalism through Max Power
There is a philosophy in travel that you should carry less. I agree. But you don’t carry less by suffering without power. You carry less by carrying smarter.
My Multi-Port GaN charger weighs 210 grams. The three chargers it replaced weighed 650 grams. I have saved nearly a pound of weight and four square inches of packing space. I have reduced my outlet requirement from 3 to 1.
When I walk into a coffee shop in Saigon, I don’t hunt for the outlet strip behind the couch. One socket is good for me. I plug in my grey GaN brick, plug in my laptop & my phone. Looking at the person next to me, who is juggling two bricks, a wall wart, and a dying power strip, I smile.
Stop carrying a menagerie of silicon bricks. Buy a multi-port GaN charger. Charge everything. Charge it fast. And never look back.
Safe travels, and keep your voltage high.
