Xiaomi Robot Vacuum S40C — Prices & Offers

How much does the Xiaomi Robot Vacuum S40C cost in the UK?

As of 13 September 2026, tracked UK prices for the Xiaomi Robot Vacuum S40C 2-in-1 Vacuum and Mop with 5000Pa Suction and LDS Laser Navigation range from £115.99 to £181.04, depending on the seller. That's a difference of more than £65 for the same model, so it's worth checking more than one listing rather than buying from the first page you land on. Prices for this kind of robot vacuum move around based on the retailer, current stock levels, and whether you're buying from a dedicated electronics seller or a marketplace listing.

Current tracked prices by UK retailer

Retailer	Price	Stock status
Techinn.com	£115.99	In stock
PriceRunner	£150.32	Unconfirmed
Links	£154.57	In stock
idealo (price comparison)	£154.77	Unconfirmed
eBay – seller smartonly	£181.04	In stock

These figures were captured on 13 September 2026 and are a snapshot, not a live feed — online prices for this model can change within hours, and a listing marked "in stock" today may sell out or be repriced tomorrow. PriceRunner and idealo are price-comparison services rather than retailers in their own right, so their listed figures point to third-party sellers whose stock we couldn't independently confirm at the time of tracking. The eBay listing from smartonly is a marketplace sale rather than a manufacturer or major-retailer channel, which is worth keeping in mind alongside the higher price. For the most current figures, the comparison tool pulls together tracked offers in one place so you're not relying on a single snapshot.

What you're paying for: the S40C's specification

The S40C is a 2-in-1 vacuum-and-mop robot built around LDS (laser distance sensor) navigation with 360° scanning, which maps a room before cleaning rather than bumping around blindly. Its headline suction figure is 5000Pa (5kPa) — spread across four power modes (Silent, Standard, Strong, Turbo) so you can trade noise for cleaning power depending on the room. A single charge runs for up to 110 minutes on its 2.6Ah lithium-ion battery, and the machine weighs 3.44kg.

For mopping, it uses a combined mop-and-water-tank assembly with a 260ml reservoir offering three water output levels, alongside a separate charging dock (model E101CDZ). Dust collects in a 520ml bagless bin fitted with a washable HEPA filter, and the box includes one side brush, the power adapter, a user manual, and a warranty notice. Running noise is rated at 62dB and power draw at 55W. There's no self-emptying dock or onboard water heating in this bundle — it's a straightforward robot-and-dock setup rather than an all-in-one base station.

For the full breakdown of how these specs perform in practice, see the full Xiaomi Robot Vacuum S40C review.

Why the S40C costs less than the S40 and S40 Pro

Xiaomi sells three robots in this generation — S40C, S40, and S40 Pro — and the price gaps largely track the spec gaps between them. The S40C sits at the bottom of the range: it has the lowest sealed suction of the three at 5kPa, against 10kPa on the standard S40 and 15kPa on the S40 Pro. It's also the lightest at 3.44kg, carries the smallest battery (2.6Ah), and has the shortest runtime (110 minutes) in the family. If you're comparing Xiaomi robot vacuum price UK listings across the range, that pattern is a useful shortcut: lower suction, lighter body, and shorter battery life generally line up with a lower asking price, while the Pro variant's extra suction and features push its price up correspondingly.

That trade-off makes the S40C a reasonable fit for smaller flats, hard floors, or lighter debris where 5kPa is enough — but if you have thick carpet, pet hair, or a larger floor area to cover in one charge, the step up to the S40 or S40 Pro may be worth the difference. You can see how the three models line up feature-by-feature, and against other brands, using the comparison tool, or browse the wider Xiaomi vacuum cleaner lineup if you're still deciding which tier suits your home.

What else moves the price around

A few factors beyond the model itself affect what you'll actually pay:

• Marketplace vs retailer listings. Marketplace sales (like the eBay listing tracked above) can carry different pricing, seller terms, and return processes than a dedicated retailer's own checkout.
• Stock levels. When a specific colour or bundle runs low, remaining stock is sometimes priced higher, or a listing may go temporarily unavailable.
• Comparison-site listings. Prices shown on PriceRunner or idealo route through to a third-party seller, so the price and stock status shown there can lag behind what's actually available when you click through.
• Bundle inclusions. Some listings may bundle extra accessories or spare filters; always check exactly what's included before comparing headline prices.

Where to buy the S40C

With prices spread across five tracked sources, the sensible approach is to check current listings rather than rely on a single number — the cheapest tracked price (£115.99 at Techinn.com) and the most expensive (£181.04 on eBay) are both live options, but stock and terms differ. Confirm stock status directly on the retailer's page before ordering, particularly for the PriceRunner and idealo listings where availability wasn't confirmed at the time of tracking. If the S40C's lower suction and shorter runtime give you second thoughts, it's worth comparing it against other robot vacuums in a similar price bracket, or against its own S40 and S40 Pro siblings, before deciding.