USB wall socket buying guide
Updated: October 2026
You are looking at a white double socket that still has a phone brick in one of the 13 A outlets, and the amazon.co.uk title next to it says 15 W. The same page also shows 3120 W. This USB wall socket buying guide splits those two figures before you choose among the four British General plates in our [USB socket comparison](/hub/sockets-and-extension-leads/usb-socket). The set runs from a 12 W USB-A plate at £8.86 to a 30 W plate at £20. Updated 16 October 2026. We did not lab-test the plates.
You are looking at a white double socket that still has a phone brick in one of the 13 A outlets, and the amazon.co.uk title next to it says 15 W. The same page also shows 3120 W.
You are looking at a white double socket that still has a phone brick in one of the 13 A outlets, and the amazon.co.uk title next to it says 15 W. The same page also shows 3120 W. This USB wall socket buying guide splits those two figures before you choose among the four British General plates in our USB socket comparison. The set runs from a 12 W USB-A plate at £8.86 to a 30 W plate at £20. Updated 16 October 2026. We did not lab-test the plates.
Our top picks
| Badge | Product | USB ports | USB power | Fast charge | Note | Price | Offer |
|---|---|---|---|---|---|---|---|
| Best overall |  British General BG 15 W square, A+A+C | 2 USB-A + 1 USB-C | 15 W shared | Not stated | 9.4 | about £15.99 | View offer |
| Best value |  British General BG 15 W round, A+A+C | 2 USB-A + 1 USB-C | 15 W shared | Not stated | 9.3 | about £12.99 | View offer |
| Alternative |  British General BG 30 W round, A+C+C | 1 USB-A + 2 USB-C | 30 W shared | PD and QC | 8.7 | about £20 | View offer |
On this page
What the two watt figures mean
The large number is the mains rating, not the charger. Each plate is a 13 A double socket. At the 240 V written on the listing, 13 times 240 is 3120, which is why the attribute says 3120 W. That figure describes the socket outlets. It does not mean the USB ports can deliver three kilowatts.
The USB figure is 12 W, 15 W, or 30 W. Treat it as one shared pool unless that listing says each port has its own budget. On the £8.86 plate, model 922UAA12-01, reviewers who left two recent phones on overnight still found them low. Some described the share as about 2.4 A. That line is a review description, not a measurement we made. A conditional pick sits on the best USB wall socket page.
Ports and protocols
Current phones use USB-C, and the cheapest plate does not have it. B0D2F4MZXK gives you two USB-A ports at 12 W. Buy it only if every cable you still use is USB-A and you charge one device at a time. The two 15 W plates add one USB-C port beside two USB-A ports. The round-edge model 822UAAC15-01 is £12.99. The square-edge model 922UAAC15-01 is £15.99. Neither names Power Delivery or Quick Charge. Smart charge is not the same handshake as USB-PD.
The £20 plate, model 822UACC30-01, has one USB-A port and two USB-C ports, and it is the only listing here that names PD and QC. A reviewer said a Nikon ZF battery would not charge. Another found the USB-A port did not move an iPhone in about ten minutes while USB-C did.
The standard line and the room
Only B0DN255MB4 prints Specification Met: BS 1363. Do not copy that line onto the other three because they share a brand. BSI’s 2023 note says the socket standard now covers incorporated USB charging circuits. That describes the standard. It is not a certificate for the £8.86, £12.99, or £15.99 plates.
None of the four states an IP rating. Bathroom and outdoor questions on these pages are asked and not answered. Electrical Safety First says a 13 A socket in a bathroom is only appropriate if it can sit at least 2.5 m from the edge of the bath or shower tray. A shaver supply unit is the exception they name. The 12 W and 30 W bullets say a 25 mm minimum. The two 15 W listings say nothing. A box that already holds a ring is covered on the USB socket back box depth page.
What to ignore in the listing
The round 15 W page and the square 15 W page both carry a plug-type attribute that says a North American 2-pin plug. The titles are UK 13 A wall sockets. The box is a faceplate, not a travel adapter. On the round 15 W page, one bullet says square corners and a later bullet says round edge. The title says Nexus 800, round edge. Buy the edge you can see in the photos.
The printed weight on the square 15 W plate is 70 g. The sister plates are listed at 178 g or 200 g. A 10-year warranty bullet is about materials and workmanship, not proof the USB module still charges in year ten. If you would rather unplug the charger when the cable changes, that comparison is USB socket vs plug charger.
Common questions
Is the wattage per port or shared?
Read 12 W, 15 W, and 30 W as one shared pool. None of these four gives each port its own figure. Reviewers of the 30 W plate say two USB-C devices at once charge more slowly than one. The 3120 W attribute is the 13 A mains rating at 240 V.
Is 12 W enough for a modern phone?
It can maintain one phone. It is a poor match for two recent phones left overnight. In the 50 texts for the £8.86 plate, that shortfall is the repeated complaint, even with 4.7 from 343 ratings. The plate has no USB-C port either.
Do I need USB-C on the plate?
You need it if the cable you use is USB-C. The £8.86 plate is USB-A only. The two 15 W plates have one USB-C port each. The £20 plate has two. A USB-C hole without a PD line is still a 15 W shared charge.
What does 3120 W mean?
It is 13 A times 240 V, the mains attribute on all four listings. The socket is a UK 13 A double. The USB module is not a 3120 W supply. The phone belongs on the 12 W, 15 W, or 30 W figure.
Does one BG listing’s BS 1363 line cover the others?
No. Only B0DN255MB4 prints Specification Met: BS 1363. The brand is the same and the plates look related, but each amazon.co.uk page stands on its own text. Do not treat the other three as failed products. Treat them as listings that do not show that line.
Will 15 W or 30 W replace a laptop charger?
Not on these reviews. A square 15 W reviewer could not finish a laptop charge on USB-C. The 30 W listing claims PD, and the sample still shows shared power and a camera that would not charge. Keep the laptop brick in a 13 A socket.
Related pages
Sources
Public UK sources on BS 1363, Part P, bathrooms, and back-box depth. amazon.co.uk listings for B0D2F4MZXK, B0D2DVZY8H, B0D2DX8RN9, and B0DN255MB4 checked 16 October 2026. Prices move.
- BSI Knowledge, changes to the BS 1363 series (retrieved 16 October 2026)
- GOV.UK, replacements and repairs to your home (retrieved 16 October 2026)
- Welsh Government, building regulations: electrics (retrieved 16 October 2026)
- IET, Part P frequently asked questions (retrieved 16 October 2026)
- IET, Part P in Scotland and Northern Ireland (retrieved 16 October 2026)
- Electrical Safety First, bathrooms (retrieved 16 October 2026)
- BG Electrical, USB charging socket example (retrieved 16 October 2026)
- BuildWiz, USB socket (retrieved 16 October 2026)
- Communities NI, electrical safety standards for private tenancies 2024 (retrieved 16 October 2026)