# usmile C10 Portable Water Flosser, 180ml, 95-Day Battery

Source: https://www.ranked10.co.uk/home/best-water-flossers/usmile-c10-water-flosser
Ranked #8 in "Best Water Flosser 2026: 10 Ranked, and Why the Cheapest Wins": https://www.ranked10.co.uk/home/best-water-flossers

- Price: £65.99 (checked on Amazon UK on 2026-09-15)
- Amazon rating: 4.5 from 1,414 ratings
- Buy on Amazon: https://www.amazon.co.uk/dp/B0F7XH6RW3?tag=ranked10-21

The usmile C10 sits at number 8 in this guide at £65.99. That makes it the second most expensive flosser here, after the £69.99 Waterpik Cordless Advanced, and it carries the highest customer rating on the list: 4.5 out of 5. The count behind that 4.5 is 1,414 ratings. The £19.97 COSLUS, rated 4.3, has 47,762 ratings; the £24.99 Hangsun, also 4.3, has 29,039. So the usmile has the better score, from under 3% of the reviewers behind the cheapest model's score.

What the usmile listing does give is a stated 180 ml tank. The Waterpik Pulse lists 450ml, the largest figure in this guide, and the Cordless Advanced lists no volume at all. The usmile states its 180 ml but pairs it with no flossing time per fill — the only runtime number on the page is the 95-day battery claim, which is about charging, not about how long 180 ml lasts. Everything on this page is taken from the Amazon listing, not from our own testing.

## Specification

| Field | Value |
|---|---|
| Price | £65.99 |
| Rating | 4.5 out of 5 from 1,414 ratings |
| Tank volume | 180 ml |
| Battery life claim | Up to 95 days |
| Modes | 4 (Soft, Normal, Pulse, Strong) |
| Waterproofing | IPX7, shower-safe (as listed) |
| Weight | 540 g |
| Dimensions | 7.2 x 4.4 x 14.7 cm |

## Questions people ask

**How long does the battery last on the usmile C10?**

The listing claims up to 95 days of battery life, charged through the included cable.

**How much water does the tank hold?**

The usmile C10 specifications list 180 ml. The listing gives no figure for how many seconds or minutes of flossing that 180 ml provides.

**Can I use it in the shower?**

The listing rates the usmile C10 as IPX7 waterproof and says this design allows safe use in the shower.

**What pressure modes does it have?**

Four: Soft, Normal, Pulse and Strong, chosen to suit sensitive gums, orthodontics or general cleaning.

**Is the usmile C10 suitable for braces, implants and crowns?**

The listing says the pulse water stream targets plaque and food debris around braces, implants and dental work, and that the nozzles rotate 360° to reach those areas.

**What are the returns and warranty terms?**

The listing states a 30-day free return policy and 1-year after-sale service, with support contacted through Amazon.