Independent comparisons. We may earn from shop links. More info

Extension lead USB C charging and Power Delivery watts

Updated: 23 October 2026

A USB-C socket on an extension lead looks like the small charger you already trust for a laptop, and the original brick goes in a drawer. Extension lead USB C charging only works that way when the listing states Power Delivery and a wattage your laptop maker already asks for. In this amazon.co.uk set, most USB-C ports are 5 V banks shared with USB-A. The [extension lead with USB comparison](/hub/sockets-and-extension-leads/extension-lead-with-usb) holds every row. This page is only about port power. Peter F. matched those listing lines on 20 October 2026 and did not measure a single port. A qualifying purchase can earn a commission at no extra cost to you.

A USB-C socket on an extension lead looks like the small charger you already trust for a laptop, and the original brick goes in a drawer.

Our top picks

SE UKASE SE UKASE 65 W USB-C tower

Best overall

SE UKASE SE UKASE 65 W USB-C tower
7.1/10about £26.99
View offer
POWSAF POWSAF 4-socket USB block

Best value

POWSAF POWSAF 4-socket USB block
6.8/10about £9.99
View offer
SE UKASE SE UKASE 20 W USB-C strip

Alternative

SE UKASE SE UKASE 20 W USB-C strip
5.5/10about £12.62
View offer
On this page
  1. 1.Shared 5 V USB banks
  2. 2.Stated Power Delivery watts
  3. 3.When USB-C is not laptop-grade
  4. 4.Switches and USB that stays on

Shared 5 V USB banks

The ordinary pattern here is one pool of current at 5 V. POWSAF shares 5 V / 3.4 A, and a review says that USB-C port is not Power Delivery. Addtam shares 4.5 A, the switched HANYCONY bar shares 3.1 A, HAFINO shares 5 A, and the four-socket SE UKASE tower shares 5 V / 4.2 A. AUNNO lists up to 5 V / 2.4 A and does not print a Power Delivery wattage. Five volts times about 3 A is about 15 W. The JSVER bars are USB-A only. The buying guide puts that bank next to the 10 A and 13 A lines, because USB never increases the fuse.

Stated Power Delivery watts

Two listings print watts you can compare with a laptop charger. SE UKASE B0CZRSR1ZL states USB-C at 5 V, 3 A, 20 W, and calls it PD. The lead is £12.62. Tech Advisor’s charger guidance, a rule of thumb and not a test of this lead, puts a small laptop around 30–45 W and a mid-size laptop around 65 W. A 20 W port sits under the small-laptop band. The file is 4.1 from 209 reviews, with USB-C ports that failed physically. SE UKASE B0FVX4KV85 states up to 65 W from one USB-C port and 20 W from three others, on a six-socket tower at £26.99. That 65 W figure is the only one in this set that meets the mid-size rule of thumb, and it is one port. The star line is 4.7 from 30 reviews. This page does not treat that as a measured 65 W. If the laptop’s charger is above 65 W, keep the original brick in a mains socket.
SE UKASE SE UKASE 65 W USB-C tower

Testsieger

SE UKASE SE UKASE 65 W USB-C tower
7.1/10about £26.99
View offer

When USB-C is not laptop-grade

Addtam prints the limit in the bullets: the USB-C ports do not support a MacBook or other laptops that need 14–22 V. A USB-C logo without that voltage is a 5 V charger that happens to use the oval plug. POWSAF’s feature line mentions a laptop, and a review still says the USB-C port is not PD. Believe the 5 V / 3.4 A line. KLINTOS, HAFINO and the four-socket SE UKASE tower do not state Power Delivery watts. HAFINO’s recommended uses mention laptops because a laptop brick can go in a mains socket, which is not the same as charging from the USB face. When the port is not laptop-grade, plug the original charger into a mains socket. The best extension lead with USB page says when the 65 W tower is the one to pay for.

Switches and USB that stays on

A master switch is only useful if it kills the ports you think it kills. On the JSVER bars and, in reviews, on the 65 W tower, one switch cuts mains and USB together. HANYCONY’s pair-switched bar leaves USB-A and USB-C on. HAFINO reviews say the USB ports and the power light stay on. An off socket does not create a 65 W port. On AUNNO, one buyer says the fourth socket switch has to be on before USB works. If a dark bedroom matters, read that switch note before you compare wattage. A port left on under a cushion is the case the safe use page tells you to unplug.

Common questions

What is the difference between 5 V / 3.4 A and 20 W PD?
Five volts at 3.4 A is a shared low-voltage pool, about 17 W if the whole bank were on one port, and POWSAF splits it across four ports with a review that says USB-C is not Power Delivery. Twenty watts PD, on B0CZRSR1ZL, is a stated negotiation at 5 V and 3 A on the USB-C claim. It is still below the 30–45 W small-laptop rule of thumb from Tech Advisor. This page did not measure either figure.
Which ASIN in this set states 65 W USB-C?
B0FVX4KV85, the SE UKASE six-socket tower at £26.99. The bullets put 65 W on one USB-C port and 20 W on three USB-C ports, plus one USB-A port. No other row prints 65 W. The file has 30 reviews. Treat 65 W as the seller’s figure, and check it against the wattage printed on your laptop’s original charger.
Can I charge a MacBook from any USB-C port here?
No. Addtam says its USB-C ports do not support MacBooks or other laptops that need 14–22 V. POWSAF, HAFINO, KLINTOS, AUNNO and the four-socket SE tower do not state a PD wattage. The 20 W SE UKASE lead is under a typical laptop charger. Only the 65 W claim on B0FVX4KV85 reaches the mid-size band in the Tech Advisor rule of thumb, and only on one port, unverified by this comparison.
Why does Addtam say its USB-C does not support MacBooks?
Because those laptops expect a higher voltage than a 5 V phone port, and Addtam’s bullet names 14–22 V as unsupported. The block still offers two USB-C and two USB-A ports on a 4.5 A share, which is coherent for phones and tablets. The sentence stops you treating the oval port as a laptop supply. Other brands in this set leave that sentence out and list laptop among compatible devices anyway.
Is USB-C on POWSAF the same as on the SE UKASE PD strip?
No. POWSAF is a shared 5 V / 3.4 A bank, and a review says it is not Power Delivery. B0CZRSR1ZL states 20 W PD. They both use a USB-C shape. The same cable can fit and still charge slowly, or not charge a laptop, on the POWSAF port. Price does not close that gap: POWSAF is £9.99 and the 20 W lead is £12.62, and the review records are not equal either.

Related pages

Tower or strip extension lead

Extension lead with USB

Best extension lead with USB for desk, tower or laptop

Extension lead with USB buying guide and amp checks

Extension lead safety for a USB lead you already have

Sources

Sources taken from the research digest. Listings were scored on 20 October 2026. This page did not run a lab test.

  1. Electrical Safety First — Extension leads (retrieved 20.10.2026)
  2. Electrical Safety First — Plugs and fuses (retrieved 20.10.2026)
  3. Plugs and Sockets etc. (Safety) Regulations 1994 (retrieved 20.10.2026)
  4. Electrical Equipment (Safety) Regulations 2016 (retrieved 20.10.2026)
  5. BEAMA — Extension lead safety checklist (retrieved 20.10.2026)
  6. BSI — BS 1363-2:2023 (retrieved 20.10.2026)
  7. London Fire Brigade — Cables, fuses and leads (retrieved 20.10.2026)
  8. Tech Advisor — USB-C chargers (retrieved 20.10.2026)