WattLock vs StopWatt
Updated October 2026 · WattLock UK team
Weighing up StopWatt and WattLock? Here's a simple, fact-based checklist to compare plug-in energy savers.
Quick answer
Compare StopWatt and WattLock on UK socket compatibility, safety details, guarantee and UK support. WattLock is built to the UK plug standard and comes with a 30-day money-back guarantee.
Questions to ask any seller
- Is it built for UK 3-pin sockets?
- Is there clear safety information?
- How long is the money-back guarantee, and who pays return postage?
- Does it ship from and support UK customers?
How WattLock answers them
- Built to the UK plug standard with an approved capacitor
- Fire-resistant casing
- 30-day money-back guarantee
- Free UK delivery and UK email support
| Bundle | Price | Was | Price per unit | Typical home |
|---|---|---|---|---|
| 1 × WattLock | £39 | £78 | £39.00 | Flat or small bungalow (1 circuit) |
| 2 × WattLock | £59 | £156 | £29.50 | 2–3 bed house |
| 3 × WattLock | £78 | £234 | £26.00 | House with separate kitchen circuit |
| 4 × WattLock | £117 | £312 | £29.25 | Large home or extension |
StopWatt and WattLock: what to look at
StopWatt and WattLock are both small plug-in energy savers. We don't publish claims about other brands' internals or results, but we do encourage you to ask every seller the same questions so you can compare like with like – especially on plug type, guarantee and delivery to the UK.
Some energy savers marketed in the UK are shipped from overseas with non-UK plugs. Check the listing carefully: you should never need an adaptor for a device that's meant to stay plugged in.
WattLock's answers
- UK 3-pin plug: yes
- Fire-resistant casing: yes
- Delivery: free, tracked, UK
- Guarantee: 30-day money-back
- Support: UK email support
- Price: from £26 per unit in bundles
Frequently asked questions
Free UK delivery · 30-day money-back guarantee
Order WattLock
Up to 62% off- 1Enter delivery address
- 2Pay securely
- 3Dispatched with tracking
Free UK delivery
30-day money-back guarantee. Not happy? Send it back for a full refund. Read the terms. Secure Shopify checkout, prices include VAT.