Zendure SuperPort S2 and S4 GaN USB-C charger review

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REVIEW – The charger battle in my home has heated up. I’m finally collecting more gadgets that accept USB-C plugs. However, I’m stuck with the tiny ones that come packed in the box. Zendure’s SuperPort Gallium Nitride (GaN) chargers just might be my ticket to charging heaven.

What is it?

The Zendure SuperPort S2 is a compact USB-A and USB-C charger that’s rated at 65W. It’s 50% smaller than an Apple 61W laptop charger.

Next is the big brother to the S2: the appropriately named S4. This bruiser features 4 USB ports (3 of them USB-C) and a maximum of 100W power delivery. It is 30% smaller than an Apple 96W charger and has 3 more USB ports.

I was sent samples of each in plain packaging and a USB-C cord to test.

Hardware specs

The text on the back of the chargers is difficult to read unless you have great eyesight.

SuperPort S2

USB-C: 5V/3A, 9V/3A, 12V/2.5A, 15V/3A, 20V/3.25A, 65W Max
USB-A: 5V/2.4A, 5V/3A, 18W Max
Dimension: 2.6 x 1.6 x 1.1 (inch)/66mm x 41mm x 29mm

Edit: Zendure sent this chart to explain the S2’s power distribution.

SuperPort S4

USB-C 1: 100W Max (PD 3.0)
USB-C 2: 100W Max (PD 3.0); 45W (PPS)
USB-C 3:  20W  Max (PD 3.0)
USB-A:     22.5W Max (QC 3.0/ SCP/ FCP)
Dimension: 2.4” x 3.05” x 1.1” (60 x 77.6 x 29mm)

This chart explains how the S4 divides power amongst its ports:

Design and features

Each charger comes with very small, hard to photograph labels.

Both chargers have a handsome striped wavy texture on the side. I’m glad they kept that design consistent. Prongs fold in for travel.

I almost missed it, but the tiny dot next to the ZENDURE logo lights up when powered up. They’re not very bright and won’t keep you awake at night.

I don’t have an Apple laptop charger, but I do have an Apple 18W charger that came with the iPad Pro. Yes, it’s the smallest of the bunch but the S2 isn’t that much bigger.

Each charger is about double the weight of the next smaller one. 


For testing, I used the dark blue USB-C cable Zendure sent me to charge up the SuperTank Pro.


The tiny Apple 18W charger showed over 16W of power to the SuperTank Pro, and over 57W from the Zendure S2. This seemed about right.

However, I noticed the same 57W from the bigger S4, which is rated at 100W when just using one USB-C output. What was going on?

I don’t know what the “freebie” cable Zendure sent me was rated for, so I pulled my Anker 100W USB-C cable and tried again. This time, I came much closer. The SuperTank Pro showed 98W of power delivery.


A few days later, I tried charging the SuperTank Pro with both the braided blue Zendure cable and the cable that came with the SuperTank Pro. Both charged just under 100W. Success! The SuperTank pro was at about 80% or more. I’m not sure what’s going on, but check your cables anyway.

What I like

  • GaN technology packs a punch in a small package

What I’d change

  • Be sure to use the right cable if you want 100W output.

Final thoughts

I’m a convert. If I have to buy another charger, I’m definitely going with the new GaN chargers!

Price: S2: $39.99. S4: $69.99
Where to buy: Zendure S2 and the S4 is currently on Kickstarter
Source: The sample of this product was provided by Zendure.

3 thoughts on “Zendure SuperPort S2 and S4 GaN USB-C charger review”

  1. Gadgeteer Comment Policy - Please read before commenting
  2. I love my Anker chargers, They are super high quality, reliable and portable. What I don’t like is all of my Anker products also are wrapped in electrical tape. This is because for some reason durring a management design meeting at Anker someone high up on the food chain decided that ALL Anker products must also double as emergency Alien landing pads visible from orbit. One Anker charger lit up our Cabin on a cruise bright enough to read a book in.

  3. What I like the most of these new devices is that you take a charger and a battery pack all in one, you dont need to think on taking the battery pack and the laptop and the mobile stuff chargers.

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