Xiaomi Robot Vacuum S40C 2-in-1 Vacuum and Mop with 5000Pa Suction and LDS Laser Navigation

No. It comes with a standard charging dock (model E101CDZ) rather than a self-emptying one, so the 520ml dust bin needs manual emptying after each clean. An auto-empty station (model OV51JCZ) is sold separately and isn't included in the £139.99 price, so adding hands-off dust disposal means paying extra on top of the base cost. That 520ml bin is already compact next to larger robot vacuums, so busier households running the S40C's 5000Pa suction across multiple rooms in one 110-minute session may find manual emptying a more frequent task than on models with a bigger onboard bin or included auto-empty dock.

Xiaomi's spec sheet lists a maximum runtime of 110 minutes per charge from its 2.6Ah lithium-ion battery, with a full recharge taking around 4 hours through the standard charging dock. Actual runtime will be shorter in the higher Strong or Turbo suction modes, or when the 260ml water tank is used for mopping alongside vacuuming, since both draw more power than the Silent or Standard settings. Because the included dock only charges the robot rather than emptying it, that roughly 4-hour recharge window is also when you'd manually clear the 520ml dust bin, since there's no auto-empty function bundled into the £139.99 price.

Yes. It's a 2-in-1 model with a 260ml water tank and three output levels, and it uses an ultrasonic sensor to lift the mop pad by 20mm when it detects carpet, so rugs stay dry while hard floors get mopped in the same pass. This mopping function runs alongside the S40C's 5000Pa suction across four power modes and its LDS laser navigation, which maps rooms and auto-recharges and resumes cleaning where it left off. At £139.99, getting combined vacuum-and-mop capability with carpet-aware mop lifting is a reasonable feature set for a budget model, even though the 520ml dust bin still needs manual emptying since there's no auto-empty dock included.

The filter is washable for routine maintenance, but Xiaomi's documentation indicates it should still be replaced periodically, roughly every 6–12 months depending on use. That combination of washable-but-eventually-replaceable is a genuine advantage over some pricier Xiaomi robot vacuums whose HEPA filters can't be washed at all, helping offset the S40C's compact 520ml dust bin and lack of an included auto-empty dock at its £139.99 price. The filter operates alongside the robot's 5000Pa suction across Silent, Standard, Strong and Turbo modes, and the whole unit carries a 2-year warranty, though that warranty typically wouldn't cover routine filter wear or replacement.

Xiaomi hasn't published a wattage figure for suction on this model — only the 5000Pa rating across four power modes (Silent, Standard, Strong and Turbo) is available, so it can't be compared directly to vacuums rated in watts or air watts. That 5000Pa figure is on the lower end for a robot vacuum, reflecting the S40C's position as a budget model at £139.99 with a 2.6Ah battery and 110-minute runtime rather than a flagship spec sheet. The suction works alongside LDS laser navigation and an ultrasonic carpet sensor that lifts the mop pad automatically, so cleaning performance in practice depends on that combination of features rather than the Pa figure alone.