A GaN charger and cable combination determines how fast a phone, tablet or laptop actually charges, and the wrong pairing leaves a high-wattage charger throttled by a low-rated cable. Choosing well means matching the charger's port wattage to the device, understanding how power splits when several ports are in use, and checking that the cable itself is rated for the speed you want.
- Match port wattage to the device: our listings pair 20W ports with phones and tablets, and 65W-140W ports with laptops.
- On a multi-port GaN charger, total output is shared - the Verbatim 140W charger's total output is up to 140W shared across whatever is connected.
- A cable has its own wattage or current rating separate from the charger - a cable rated below the charger's output becomes the bottleneck.
- Mega Office Supplies lists the Verbatim GaN range from 20W to 140W and the Lindy 100W 4-port GaN charger, plus USB-C cables with stated PD ratings.
Why charger and cable choice affects charging speed
A charger's wattage is only the number printed on the box. What a device actually receives depends on which port it is plugged into, how many other devices are drawing power from the same charger at that moment, and whether the cable between the charger and the device can carry that wattage at all.
GaN (gallium nitride) chargers pack more output into a smaller housing than older silicon chargers, which is why a single GaN unit can now replace several separate chargers on a desk. That does not change the underlying rule: a charger can only deliver what its ports are rated for, and a cable can only carry what its own build supports.
How to choose the right GaN charger and cable
Match the port wattage to the device type
Start with what you are charging, not with the biggest wattage number you can find. Our own product listings tie specific port wattages to specific device types, which is a practical way to think about the split.
The Verbatim GaN Wall Charger 4 Port 140W is built around this logic directly: two USB-C PD ports handle laptops at up to 140W each, a third USB-C PD port is set at 20W for phones and tablets, and a USB-A port covers older cables. The Verbatim USB GaN Charger 100W follows a similar split, with two USB-C PD 100W ports for higher-draw devices, a USB-C PD 65W port, and a USB-A QC 3.0 port, letting a laptop, tablet, smartphone and another USB device draw power from the one unit.
If you are only charging a phone or a pair of earbuds, a lower-wattage port is not a compromise - it is the correct match. Reserve the 65W-and-above ports for laptops and other high-draw devices.
- Phones and small accessories: the 20W-class ports built into multi-port Verbatim chargers.
- Tablets and mid-draw devices: 35W to 65W, covered by the Verbatim 35W and 65W chargers.
- Laptops: 65W and up, covered by the Verbatim 100W and 140W chargers and the Lindy 100W 4-port charger's USB-C ports.
Understand how power splits across multiple ports
A multi-port GaN charger's headline wattage is a shared total, not a guarantee per port. Plugging in a second or third device changes what each port can deliver, and the exact split varies by model.
The Verbatim GaN Wall Charger 4 Port 140W states this plainly: total output is up to 140W shared across whatever is connected. The Verbatim Mini GaN Charger with Display range shows the same effect with exact numbers - on the 65W model, either USB-C port delivers up to 65W alone, but with two devices connected on USB-C the output splits 45W and 20W. On the 100W model, two USB-C devices split 65W and 30W. On the 140W model, USB-C1 and USB-C2 each handle up to 140W alone, but two laptops connected to both at once split 70W each.
The Lindy 100W 4 Port USB Type A and C GaN Charger works the same way: a single USB Type C port can output up to 20V 5A (100W), a single USB Type A port up to 12V 1.5A (18W), with 100W as the charger's total output across all ports combined.
If a device is charging slower than expected on a multi-port charger, check what else is plugged in first. Unplugging a second device often restores full speed to the one you actually need charged quickly.
Check the cable's own wattage or current rating
A charger's output means nothing if the cable connecting it to the device cannot carry that much power. Cables carry their own separate rating, and it is listed on the product page, not assumed from the connector type.
The Lindy 1m USB 3.2 Type C to C Cable 20Gbps 5A PD is E-marked for up to 100W Power Delivery at 5A, which is enough to carry the full output of the Verbatim 100W or Lindy 100W chargers to a laptop. A cable without that rating caps the charge speed well below what the charger is capable of, even when both ports are matched correctly.
To get the full 140W from a 140W charger, the cable itself needs to be rated 140W or higher - the Lindy 5A cable above tops out at 100W, so it is not enough on its own to carry a 140W charge. The Verbatim USB-C to USB-C Cable 240W 40Gbps 120cm is rated well above that requirement and will carry a full 140W charge.
The bundled cable in the Verbatim Mini GaN Charger 20W with 1m USB-C Cable is a useful comparison: its included cable is rated for up to 60W, well above what the bundled 20W charger needs for a phone, but still below what a 100W or 140W charger could push through it. The same cable works fine for phone charging and is simply the limiting factor if later paired with a higher-output charger.
- Check the cable's stated wattage or amp (A) rating before assuming it matches the charger.
- A higher-rated cable works with a lower-power charger; the reverse does not hold.
- Reuse cables deliberately - a bundled cable rated for a small charger may already be a bottleneck for a bigger one.
Plan for how many devices charge at once
Decide whether you need one high-output port for a laptop, or several moderate ports for phones and accessories running at the same time. A single-purpose charger is often the simpler and more predictable choice.
For a desk running a laptop alongside a phone and a tablet, a 100W or 140W multi-port charger from the Verbatim range, or the Lindy 100W 4-port charger, covers all three from one power point. For a single device or a travel bag, the Verbatim 35W or 65W chargers are more compact without forcing the same wattage decisions.
Compare GaN chargers by use case
| Charger | Ports | Suited to | Power-sharing note |
|---|---|---|---|
| Verbatim Mini GaN Charger 20W with Cable | 1x USB-C | A single phone or tablet | Single port, no sharing; includes a cable rated to 60W |
| Verbatim 35W 2 Port | USB-A + USB-C | Two smaller devices | Lower total output than the higher models |
| Verbatim 65W 3 Port | USB-A + 2x USB-C | A laptop plus accessories | Shared output across 3 ports |
| Verbatim USB GaN Charger 100W | 2x USB-C PD 100W, 1x USB-C PD 65W, 1x USB-A | Laptop, tablet, phone together | Multiple high-wattage ports share the total |
| Verbatim GaN Wall Charger 4 Port 140W | 2x USB-C up to 140W, 1x USB-C 20W, 1x USB-A | Desk replacing several chargers | States up to 140W shared total |
| Lindy 100W 4 Port USB Type A and C | 2x USB-C, 2x USB-A | Laptop plus legacy USB-A devices | Single Type C port up to 100W; 100W total output |
Common mistakes when buying a GaN charger and cable
Buying the highest-wattage charger without checking port allocation
A 140W charger does not mean every port delivers 140W. Check which specific port a laptop needs to use to get the full rated output, and plug lower-draw devices into the other ports.
Reusing a low-rated cable with a new high-power charger
A cable bundled with a 20W charger is not automatically ready for a 100W or 140W charger. Check the cable's own rating before assuming the upgrade will charge any faster.
Expecting full output with every port in use
On any multi-port GaN charger, adding more connected devices changes what each port delivers. If a laptop needs to charge at full speed, unplug the other devices from that charger first.
Ignoring the USB-A ports on a mixed charger
USB-A ports on these chargers are rated lower than the USB-C ports - 18W on the Lindy 100W 4-port charger, for example. They suit older cables and smaller devices, not laptops.
FAQ
Does a higher-wattage GaN charger always charge a phone faster?
Only up to the point the phone itself can accept. Once a device's maximum charging rate is reached, extra wattage on the charger's port does not speed it up further - the port wattage only matters up to what the device and cable can use.
Can I use a 140W GaN charger for a phone?
Yes, provided you use a port suited to the device. The Verbatim 140W charger has a 20W USB-C port specifically for phones and tablets alongside its 140W ports for laptops.
Why is my laptop charging slower on a multi-port charger?
Check how many other devices are connected. Multi-port GaN chargers share a total output, so a second or third device plugged in reduces what any single port delivers.
Does the cable matter if the charger is rated high enough?
Yes. A charger can only deliver what the cable can carry. A cable rated below the charger's output, such as a 60W-rated cable paired with a 100W charger, becomes the limiting factor.
What's the difference between the Verbatim and Lindy GaN chargers Mega Office Supplies sells?
The Verbatim range spans 20W to 140W across single and multi-port models, while the Lindy option is a 100W 4-port charger combining USB Type A and C ports with a shared 100W total output.
How do I know if a USB-C cable supports fast charging?
Check the product listing for a stated wattage or amperage (A) rating. A cable without that information printed on its listing should not be assumed to support higher-speed charging.
One last thing
The cable is the easiest part of the setup to overlook because it rarely gets replaced alongside the charger. Before assuming a new high-wattage charger is underperforming, check the rating on the cable sitting between it and the device - it is often the actual limit.
