The Mijia Mop 3C Plus looks like a budget robot vacuum trying to seem more serious than it is. Mostly it isn’t pretending. It does more than the price suggests, but the bill comes in setup time as well as money. Here is what works, what doesn’t, and who should bother.
Which model is this?
“3C Plus” is a reseller name. Xiaomi sells this robot as the Mijia Sweeping Robot 3C Enhanced Edition (model C103), an upgrade of the 2022 Mijia 3C. It launched in China in mid-2023 at 1,099 yuan, about $154. Search both names when comparing prices.
Mijia Mop 3C Plus Specs
It has lidar navigation, 5000 Pa maximum suction, a 400 ml dust compartment and a 270 ml electronically controlled water tank. Battery capacity is listed as 2,500 or 2,600 mAh depending on the seller. The original 3C had 4000 Pa, a 300 ml bin and a 200 ml tank, so this upgrade is mostly more suction and more capacity. The suction figure is the manufacturer’s maximum, not an independent measurement.
Design and what’s in the box
The body is white and round, with orange accents that take the edge off the sterile look. It is 325 mm across and 98 mm tall, so it clears most sofas and nightstands but not very low furniture. The box holds the robot, a charging dock, a side brush, a Velcro mop cloth and a paper manual. Depending on the seller, the manual may be in Chinese and the plug may be Chinese too, so check the listing first.
The dust bin and water tank share one housing that slides in from the back. That saves space, but you stop more often to empty and refill. Reseller listings mention a HEPA filter, which helps with pet hair and fine dust. I couldn’t find that on a Xiaomi page.
Navigation and mapping
Navigation is the reason to buy this robot. The lidar scans the room, builds a detailed map and skips the random swerving of cheaper laser-less models. It follows the perimeter, touches furniture gently with its bumper, and cliff sensors stop it from dropping down stairs. It climbs thresholds of about 2 cm, which covers ordinary doorways. Anything taller needs a ramp.
It leaves a 15 to 20 cm gap around chair and table legs, which feels wasteful in a small apartment. Virtual walls and no-go zones in the app make up for it. The app stores multiple maps and lets you set a mode per room, for example stronger suction in the kitchen and no mopping in a carpeted bedroom. One warning: Xiaomi robots in this family can struggle with very dark floors, so test yours.
Dry cleaning
The 5000 Pa figure isn’t just marketing. The robot picks up dust, crumbs and hair without leaving streaks. I have a cat, and the bin was full of fur after a single pass. The brush copes with hair, though tangles still form and you will clean it by hand about once a week. Bow-shaped (zigzag) and Y-shaped paths help along walls, but like most robots at this price it misses tight corners.
Mopping
Mopping is the weak side. A pump wets a Velcro cloth and the robot drags it along. There is no vibration and there are no spinning discs. That is fine for refreshing a lightly dirty floor every day. It won’t handle dried-on stains or post-renovation dust. Think of it as wiping the floor with a slightly damp cloth.
You can set the water level in the app. The 270 ml tank lasts one or two passes in a two-room apartment, depending on the setting. The robot can’t lift the mop, so mark carpets as no-mop zones.
Mijia Mop 3C Plus Battery, noise and upkeep
In my use the battery ran about 90 minutes in standard mode and about 76 at maximum power. Those are my own timings, not a standardized test, and retail listings quote a looser 60 to 90 minutes. That is enough for a one-room or small two-room flat. If the charge runs low mid-job, the robot docks, recharges (about four hours) and picks up where it stopped, so a big apartment can take several hours.
Noise is about 72 dB. At low power you can talk over it, and at maximum it hums noticeably without being harsh.
Upkeep is simple but regular. Empty the bin after every run, rinse the filter every two weeks and let it air-dry, and wash or replace the cloth. There is no self-emptying or self-washing dock.
App setup and language
Setup is the real cost. This is a China-market robot with no official Russian support. To connect through Mi Home you will probably need to switch the app region to China, so parts of the interface will be Chinese or English. Voice prompts may be Chinese too, and I couldn’t confirm that a language pack exists. Set aside an evening.
Who should buy Mijia Mop 3C Plus
Buy it if you want a cheap lidar robot for daily dry cleaning in a small apartment, up to about 60 to 70 sq m, especially with pets, and you don’t mind an evening in the app. Treat mopping as a bonus.
Skip it if you need a localized app, serious mopping or a self-emptying dock. The money buys you lidar, suction and phone control, plus the job of getting a China-market device to behave in your home. If that’s fine, it’s a good buy. If not, there are slightly pricier robots with proper global support.
