Fairywill sonic electric toothbrush

Our verdict

For an existing owner, the 507 is worth using until it stops holding a charge. Heads that fit it cost about £1 each, and it does the basic job of a timed, powered clean.

For a new purchase in the UK, we would choose an Oral-B Vitality Pro or Pro 1 instead. They cost £25 to £35 at Argos on 29 October 2026, come with a 2-year guarantee from a well-known maker, and use heads sold on every high street. The 507's selling points, a long battery life and USB charging, matter less than being able to buy the brush and its parts reliably.

Which model this is, and whether it is sold in the UK

This review covers the Fairywill 507, sometimes listed as FW-507 or FW-ET507. Fairywill makes many similar-looking sonic brushes, and their heads are not all interchangeable, so check the model number printed on the handle or box.

Fairywill's own website is a US store, which listed the 507 at $14.99 with free US shipping on 29 October 2026. When we searched Amazon UK on the same day, we found compatible heads and charging cables for the 507, but no listing for the brush itself, and a UK marketplace listing we found was marked no longer available. That is not proof it has been withdrawn, but it means UK buyers may struggle to find one new from a UK seller.

The original 2020 review bought it on Amazon UK for about £20, with a soft head, a firmer head and an interdental head. Bundles varied, and some included more heads and a travel case.

What it does

From Fairywill's 507 manual and product page:

• Five modes. White, Clean, Sensitive, Polish and Massage, selected by pressing the power button repeatedly.
• Two-minute timer. The brush pauses every 30 seconds as a cue to move on, and switches off at two minutes.
• Sonic movement. Fairywill gives over 40,000 strokes a minute.
• Waterproof to IPX7, so it can be used in the shower.
• No pressure sensor. The manual tells you not to press too hard or hold the bristles on one area for long, but nothing warns you if you do.

Fairywill says the 507 removes up to 100% more plaque within a week, improves gum health in two weeks and makes teeth noticeably whiter in two weeks, all compared with a manual brush.

Those are the manufacturer's claims, and we found no clinical trial of this model.

The only independent study we found was a 2020 laboratory test in which a robot brushed plastic model teeth coated in chalk for two minutes. A Fairywill sonic brush, model not stated, removed more chalk than one automated brush and about the same as another. That says little about real mouths, gums or plaque.

The wider evidence is about powered brushes in general. A 2026 analysis of 19 trials ranked sonic brushes second to oscillating-rotating ones, with both ahead of manual brushes, but the trials used established brands.

Charging and battery

The 507 has a built-in battery and charges through the supplied cable, which has a USB plug at one end and a small round plug at the brush end. There is no wall plug in the box. The manual says to connect it to any power source by USB, and retail listings give the charging voltage as 5 volts, so a standard USB phone charger, laptop port or power bank should work.

• Fairywill says a full charge takes about 4 hours and lasts around 30 days of normal use.
• When the battery is low, the charging light flashes 10 times.
• The light stays on while charging and goes off when full, and the brush stops charging by itself.
• On first use, or after a long time unused, the light may not come on for the first 5 minutes.

The round plug is not USB-C, so a phone cable will not fit the brush.

If you lose the original, buy a replacement cable listed for the 507; these were about £4 on Amazon UK on 29 October 2026. The battery is not replaceable.

Brush heads and running costs

Fairywill says its heads do not fit Oral-B or Philips brushes, and it directs buyers to its Amazon shop for genuine heads. On Amazon UK on 29 October 2026, the heads listed for the 507 were from other brands, typically 5 for £7.15 or 10 for £9.50. One seller says its heads are made by the factory that makes Fairywill's, which we could not verify. Check the listing names the 507, because heads for some Fairywill models, such as the E11 and P11, do not fit.

Over three years you need 12 heads, replacing them every 3 months, or sooner if the bristles splay. Spread across the heads you use, that is about £11.40 at the 10-pack price or £17.16 at the 5-pack price. In cash, the cheapest way to buy at least 12 at those prices is one 10-pack and one 5-pack, £16.65 for 15 heads; two 10-packs are £19.00 for 20. If your brush came with spare heads you need fewer. Delivery charges are not included. Either way it is far less than Oral-B or Philips heads.

Warranty and support

The manual gives a 1-year warranty from the date of purchase, covering defects in materials or manufacture, and you must send the brush and proof of purchase to Fairywill. Damage from improper use, including using the wrong power supply, is excluded. Fairywill's support is based outside the UK and handled by email. If you buy from a UK retailer, your legal rights over faulty goods are against that retailer, which Citizens Advice says is often easier than using a manufacturer's warranty.

Alternatives worth comparing

Prices are sale prices on the date shown and change often.

Who should choose it

• Keep using a 507 while it works, with compatible heads that name the model.
• Choose an Oral-B Vitality Pro or Pro 1 if you are buying in the UK and want easy-to-find heads, a longer guarantee and a UK seller.
• Choose the Sonicare 4300 if you want a sonic brush with a pressure sensor and are prepared to pay more for heads.

During aligner treatment

The 507's USB charging and long battery are handy if you brush at work or travel, because you need to clean your teeth before your aligners go back in. Keep the brush for your teeth, and clean your trays separately as described in our guide to cleaning aligners.

How this review was put together

This review first appeared on Aligners.co in September 2020, and the photo is from that review. This update is based on Fairywill's 507 manual, product page and support pages, published research and UK retailer listings checked on 29 October 2026. We did not retest the brush for this update. See more electric toothbrush reviews.