Review · PD 3.1 · 140W class
CukTech 140W: the 28V rail, at a keen price.
140W is a different specification, not a bigger number: PD 3.1 adds a 28V rail above the old 20V ceiling, and that rail fast-charges a 16″ MacBook Pro. CukTech reaches it for less, with a support caveat worth pricing in.
What PD 3.1 actually changes
Standard Power Delivery tops out at 20V, capping a port near 100W. PD 3.1 Extended Power Range adds 28V for 140W, 36V for 180W and 48V for 240W, so a 140W charger is a 28V/5A device — and 5A needs an EPR-rated e-marked cable: a 3A cable holds you near 60W. See 240W USB-C explained and e-marked cables. CukTech is the retail power brand associated with ZMI, a long-standing Xiaomi-ecosystem supplier, selling largely through US marketplace listings — distribution shapes the recommendation more than the electronics.
| Line item | 140W PD 3.1 class | Read on the listing |
|---|---|---|
| Rated output | 140W total; 28V/5A on the top port | That 140W comes from one port, not just a total |
| Port count | Multi-port — USB-C plus a USB-A | The split table for every combination |
| Protocol | PD 3.1 with EPR rails; PPS on some units | Whether 28V is listed, and any PPS range |
| Form factor | GaN, small for the wattage | Folding blades or a detachable cord |
| Notable feature | 140W output below established-brand pricing | UL or ETL mark; whether an EPR cable is included |
If the listing does not print 28V anywhere, it is not a genuine PD 3.1 charger whatever the headline says. That is the single decisive check.
What it's genuinely good at
The cheapest legitimate route to the 28V rail. The 140W class has been Apple-and-Anker priced, so a cheaper working alternative is a real service to anyone with a big laptop.
It collapses a desk. One 140W GaN brick replaces a laptop charger, a tablet charger and two phone chargers — see multi-port.
GaN makes it carryable. A 140W silicon adapter is a lump; a GaN one fits a laptop sleeve: 140W GaN chargers.
Where it falls short
US support and warranty channels are thinner than the established brands'. We will not state a warranty length we cannot verify. What we can say: with marketplace-led distribution, a claim two years out is harder. Price that in.
The cable is a hidden cost. Full speed needs an EPR-rated 5A cable; if one is not in the box, budget for it or the charger performs as a 100W unit.
Total is not per-port. A second port pulls the laptop port off 140W. If you need 140W plus real power elsewhere, buy a 240W-class unit.
Overkill for most people. If your largest device is an ultrabook, 140W buys nothing over 65W but size and cost.
Device fit
Full rated speed: MacBook Pro 16″ at Apple's 140W fast charge, MacBook Pro 14″ at 96W-class, gaming laptops on USB-C PD, Dell XPS 15/17-class. Comfortable headroom: MacBook Air, iPad Pro, Steam Deck, Switch dock, all phones. No benefit: anything capping below 100W — an iPhone charges at iPhone speed, because the device requests its own contract.
- 140W
CukTech 140W GaN
The 28V rail, priced below the big brands.
- Output
- 140W total
- Key rail
- 28V EPR
- Best for
- 16-inch laptops
- Caveat
- Thin US support
- 140W
Anker Prime 140W
Documented split table and a US support desk.
- Output
- 140W
- Standard
- PD 3.1
- Best for
- Support certainty
- Trade
- Price
- 140W
UGREEN Nexode 140W
Published ladder and split, widely stocked.
- Output
- 140W
- Standard
- PD 3.1
- Best for
- Documentation
- See
- Nexode 140W review
Buy it, or buy around it
Buy it if you own a 16″ laptop and value price over support certainty; buy an established brand if the charger is business-critical. See the 140W page, chargers for the MacBook Pro 16″, the HyperJuice 245W review, and the reviews hub.
FAQ
Do I need a special cable for 140W?
Yes. The 140W profile is 28V at 5A, which needs an e-marked cable rated for extended power range.
Is 140W safe for my phone?
Completely. Power Delivery devices request their own contract, so a phone draws what it would from a 20W charger.
What does PD 3.1 add over PD 3.0?
Three fixed rails above 20V: 28V for 140W, 36V for 180W, 48V for 240W. Without them a single port caps near 100W.
Is CukTech a Xiaomi brand?
CukTech is the retail power brand connected to ZMI, a Xiaomi-ecosystem supplier, not Xiaomi itself. In the US it sells via marketplace listings.