Dreame L40 Ultra

Pros

• Dirty water sensor ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 5.0
• Dried-On Stain Removal ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 5.0
  In dried-on stain testing the L40 scores well above average and even outperforms both Dreame’s X40 and popular rivals like the Bissell CrossWave on stubborn spots.
• Emptying & Mess Control ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 5.0
  Owners appreciate the dock’s auto-empty feature that transfers debris from the robot’s bin into a bag, greatly reducing how often they need to handle dust and dirt directly.
• Hair Pickup — Hard Floors ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 5.0
  The Dreame L40, like most robots tested, is nearly flawless at removing pet hair from hard floors, so hard-surface pet cleanup is essentially a non-issue.
• Hard Floor — Large Debris Intake ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 5.0
  Testing finds the L40 easily picks up scattered debris and larger particles from hard floors, handling basic sweeping duties without leaving noticeable bits behind.
• Mop lifting system ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 5.0
  The L40’s mop pads automatically lift about 10.5 mm on carpets and can be detached with magnets, letting it vacuum rugs and mop hard floors in a single run without soaking carpets.
• Mopping performance ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 4.8
  The dual spinning pads, adjustable water control and mop-specific features give the L40 excellent overall mopping performance, especially when combined with its strong dried-stain removal results.
• Overall opinion ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 5 reviews 4.7
  Reviews position the L40 as a top-tier robot vacuum and mop combo with outstanding cleaning power, runtime and automation that consistently ranks near the top of robot vacuum lists, though its industrial look, loud top power and finicky default pet-hair brush (fixable with the Tri-cut brush) and occasional dock squeaks are noted drawbacks.
• Battery & Charging ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 4.5
  Reviewers highlight the L40’s exceptional runtime, with around 194 minutes on low power and class-leading efficiency scores in repeated floorplan battery tests.
• Suction & Airflow ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 4.5
  Reviews report the L40’s suction and airflow are both comfortably above average and nearly match Dreame’s more expensive X40, giving it strong overall cleaning power on typical household debris.
• Comparative performance ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 3 reviews 4.3
  Reviews often place the L40 slightly behind high-spec rivals like MOVA’s P50 in raw specs but note that it can outperform Dreame’s pricier X40 in most real-world tests, so when it is substantially cheaper it is one of the smartest buys among top-tier robot vacuums, especially with updated pet-hair testing that now puts it near the very top for pet owners.
• Corner Cleaning (Robot) ★ ★ ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 4.3
  An automatically extending side brush helps the L40 reach into corners and along edges better than many standard fixed-brush robots, improving corner cleaning performance.
• Price & Value ★ ★ ★ ★ ★ ★ ★ ★ ★ 3 reviews 4.2
  As a Tier 3 flagship, the L40 is still expensive but reviews say its high-end cleaning and automation plus a significantly lower price than Dreame’s X40 and its top-tier ranking make it a strong value when on sale.
• Obstacle Avoidance (Robot) ★ ★ ★ ★ ★ ★ ★ ★ ★ 3 reviews 4.0
  Multiple tests show the L40’s camera and sensor system is significantly above average at recognizing and avoiding household objects, ranking near the top of obstacle-avoidance charts even if the X40 is slightly better.
• AI, Smart & App / Automation ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 4.0
  The Dreame app offers robust mapping, virtual barriers, cleaning schedules and live video pet monitoring, earning strong iOS ratings even though Android feedback is more mixed.
• Carpet — Medium-Pile Pickup ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 4.0
  Carpet tests show the L40 is above average at lifting deeply embedded debris like sand from rugs, performing on par with the pricier X40 in deep-cleaning trials.
• Self-cleaning cycle ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 4.0
  The base washes and hot-air dries the mop pads and uses a self-cleaning tray with squeegees to clear hair and debris from the bin, keeping maintenance low despite some reports of squeaky wash cycles.
• Solution / Liquid system ★ ★ ★ ★ ★ ★ ★ ★ ★ 1 review 4.0
• Map & Path Efficiency (Robot Vacuums) ★ ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 3.8
  Reviews describe navigation as generally good with quick mapping and efficient coverage, though some units occasionally skip a higher-pile rug unless settings in the app are adjusted.
• Pet-Ready Features ★ ★ ★ ★ ★ ★ ★ ★ ★ 2 reviews 3.8
  Recent reviews note that the L40’s stock brush tangles badly and struggles with carpeted pet hair, but pairing it with Dreame’s optional Tri-cut brush turns it into one of the best performers in new pet-hair tests, making it a top pick for pet homes if you buy the upgrade.