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This comparison uses manufacturer specifications and publicly available product information. Prices, availability, ratings and offers can change.
Research note: Everyday Helper has not independently tested these cables. Performance and durability statements are manufacturer specifications; confirm current official material before buying.
At a glance
Portronics Flash C2
Compact 1 m USB4 cable for high-power charging, high-speed data and external-display use.
Stuffcool Primus
Longer 1.8 m USB4 cable with explicit E-Marker support and the same 40Gbps/8K class of use.
Apple 240W USB-C Charge Cable
Longer 2 m charging-focused cable with USB 2 data rates rather than USB4-class bandwidth.
Quick comparison
| Feature | Portronics | Stuffcool | Apple |
|---|---|---|---|
| Charging power | Up to 240W, 48V/5A | Up to 240W PD, 5A | Up to 240W charging |
| Length | 1 m | 1.8 m | 2 m |
| USB / data | USB4 / Thunderbolt 4 positioning; up to 40Gbps | USB4; up to 40Gbps | USB 2 rates |
| Video | 8K@60Hz stated | 8K@60Hz stated | Not clearly stated in reviewed official material |
| E-Marker | Not clearly stated in reviewed official material | E-Marker chip stated | Not clearly stated in reviewed official material |
| Construction | Not clearly stated in reviewed official material | Nylon braided, aluminium housing, gold-plated connectors | Woven design |
| Warranty | 6 months | 6 months; Stuffcool states free extension to 12 months after registration | Not stated here |
| Best suited for | Short high-speed cable | Longer high-speed cable | Charging-focused 2 m use |
Portronics Flash C2
Flash C2 is USB-C to USB-C, product code POR 2802. Portronics positions it for USB4 / Thunderbolt 4 use and states up to 240W at 48V / 5A, up to 40Gbps data transfer, 8K@60Hz video support, a 1 m length and six-month warranty.
Strengths and fit
Its shorter length can suit compact desk or travel setups where high-speed data and display support matter. The official source does not clearly state an E-Marker, so this page does not infer one. Check Portronics Flash C2 on Amazon
Stuffcool Primus USB4
Stuffcool Primus is a USB-C to USB-C USB4 cable with up to 240W Power Delivery, 5A, an E-Marker chip, up to 40Gbps data transfer and 8K@60Hz video support. It is 1.8 m long with nylon braiding, aluminium housing and gold-plated connectors. Stuffcool states a six-month warranty and offers a free extension to 12 months after registration.
Strengths and fit
It may suit a user wanting similar high-speed capability with more reach and explicitly stated E-Marker support. The extended coverage is a Stuffcool offer, so check its registration terms. Check Stuffcool Primus on Amazon
Apple 240W USB-C Charge Cable
Apple’s 2 m USB-C to USB-C cable has a woven design and supports up to 240W charging, syncing and data transfer at USB 2 rates. Apple sells the power adapter separately. It is not intended here as a 40Gbps USB4 cable or an 8K display cable; it is a different, charging-focused use case.
Strengths and fit
Its 2 m reach can suit users prioritising high-power charging and everyday syncing. Confirm compatibility with the device and adapter. Check Apple 240W Cable on Amazon
240W charging does not mean 40Gbps data
Separate specifications
Charging power and data bandwidth are separate capabilities. The charger and device negotiate power; data and display performance require compatible ports, protocols and cable support.
Data visual
Portronics / Stuffcool: up to 40Gbps
Apple: USB 2 rates
A cable can support 240W while still using USB 2 data rates. Do not choose by wattage alone if fast storage transfers or display use matter.
What 5A and E-Marker mean
Higher-power USB-C cables can require 5A current support. An E-Marker can communicate a cable’s capability to compatible chargers and devices. Stuffcool explicitly confirms an E-Marker; Portronics confirms 48V / 5A. This comparison does not infer E-Marker support for Portronics or Apple where it is not clearly stated.
8K video and external displays
Portronics and Stuffcool advertise 8K@60Hz support. Actual output also depends on the source device, display and protocol support. Apple’s charging specification does not establish 8K video capability, so this page does not make that claim.
Length and warranty
Relative reach
Shorter cables are compact; longer cables give more reach. This illustration makes no performance-loss claim.
Coverage stated
Portronics: 6 months. Stuffcool: 6 months, with its stated registration extension opportunity. Apple warranty coverage is not assigned a period here because that product page does not clearly state one.
Which one suits which user?
Portronics
For a short 1 m cable with 240W charging, 40Gbps data and 8K@60Hz support.
Stuffcool
For similar USB4 performance with a 1.8 m cable and explicit E-Marker support.
Apple
For 240W charging and 2 m reach when 40Gbps data and 8K video are not needed.
Things to check before buying
- Charger wattage and device charging requirement.
- USB-C PD / EPR support where applicable.
- Data-speed and external-display requirement.
- Port and device compatibility.
- Length and stated warranty terms.
Sources and verification
Specifications reviewed: 1 October 2026. Sources: Portronics Flash C2, Stuffcool Primus, and Apple 240W USB-C Charge Cable.
Frequently asked questions
Does a 240W USB-C cable make every device charge at 240W?
No. Charging power is negotiated by the charger and device. A device draws only the power it supports, even when a cable is rated for up to 240W.
Is 240W the same as 40Gbps?
No. 240W is a charging-power capability and 40Gbps is a data-transfer capability. A cable can support high-power charging while using USB 2 data rates.
Can these cables connect a laptop to an external monitor?
Portronics Flash C2 and Stuffcool Primus advertise 8K at 60Hz video support. Actual display output also depends on the source device, display and protocol support. Apple states USB 2 data rates for its 240W cable and this page does not assume 8K video support for it.
What is an E-Marker cable?
An E-Marker is an electronic marker in a USB-C cable that can communicate cable capability to compatible devices and chargers. Stuffcool explicitly states an E-Marker for Primus; check each cable's official specification rather than assuming one.
Is Apple's 240W cable USB4?
Apple describes this cable as supporting charging, syncing and data transfer at USB 2 rates. It is not presented here as a USB4 or 40Gbps cable.
Which length is better: 1 m, 1.8 m or 2 m?
A 1 m cable is compact for desk or travel use. A 1.8 m or 2 m cable gives more reach when the charger is farther away. Choose the length that fits your setup and confirm the cable's stated capability.
Related Everyday Helper guides
For a broader explanation of power ratings, data speeds and video support, read our USB-C cable buying guide: 60W vs 100W vs 240W. Compare the 100W USB-C cable comparison, 100W GaN charger comparison, and 65W charger comparison. Read how to choose a power bank or return to the Guides hub.