Introduction
Dreame has positioned itself as a manufacturer capable of delivering advanced features at competitive prices, and these three models demonstrate exactly that strategy. The Dreame L40 Ultra and X40 Ultra arrived in 2024, whilst the L40s Pro Ultra represents the brand's 2025 refresh. All three share the multifunctional base approach with hot water mop washing and hot air drying, but the differences in suction power, battery capacity, and object recognition capabilities reveal distinct positioning within the range.
These models suit users seeking comprehensive cleaning without constant intervention. The multifunctional bases handle mop washing and drying automatically, meaning the robots return with clean mops during mopping cycles. For homes with mixed flooring, pets, or simply anyone wanting to minimise maintenance, these specifications matter considerably.
Suction Power and Brushing
The L40s Pro Ultra stands apart with 19,000 Pa suction, a substantial leap from the 11,000 Pa of the L40 Ultra and 12,000 Pa of the X40 Ultra. In practical terms, this translates to better performance on carpets and more effective debris extraction from textured surfaces. The difference becomes particularly noticeable with embedded dirt or pet hair ground into rugs.
Brush configuration tells an interesting story. The L40 Ultra uses Dreame's TriCut 3.0 system, combining bristles with cutting blades to reduce hair tangles. The X40 Ultra opts for a simpler brush design, whilst the L40s Pro Ultra introduces a dual brush system. All three models feature anti-tangle side brushes that extend to reach corners and lift when mopping to avoid dragging dirt across wet floors.
Every model can raise its main brush during mopping, preventing the brush from interfering with the wet cleaning process. The side brush also extends and retracts as needed, helping with edge coverage without compromising the mopping quality.
Mopping System
All three robots use twin rotating mops that extend for edge cleaning. The Roboswing function allows the robot to manoeuvre mops slightly under furniture edges and skirting boards. Mop lift reaches 10.5 mm on each model, sufficient for low-pile rugs but not thick carpets.
The bases wash mops with hot water at 65°C and dry them with hot air at 55°C. This matters because hot water removes grime more effectively than cold, and hot air drying prevents odours from developing in damp mops. During a mopping session, the robot returns to the base multiple times to rinse the mops, ensuring it continues cleaning with fresh pads rather than spreading dirty water.
Each robot detects dirt on both the mops and the floor itself, adjusting cleaning intensity accordingly. When the base detects the mops need another wash, it initiates an additional cleaning cycle. The robots can also automatically remove their mops at the base when switching to vacuum-only mode, avoiding the need for manual intervention.
Navigation System
LiDAR laser navigation appears across the range, combined with dual AI cameras and front-mounted 3D laser sensors. This setup enables obstacle detection and avoidance in real time. The L40s Pro Ultra recognises 180 different objects, compared to 120 on the X40 Ultra and 100 on the L40 Ultra. More recognition capability means fewer situations where the robot might become confused or stuck.
All three models identify pets and curtains, adjusting their approach to avoid disturbing animals or tangling in fabric. LED lighting supports vision in darker areas, and remote camera access lets users check on their homes through the app. CleanGenius AI manages cleaning strategy on each model, learning room layouts and adapting to different surface types.
The L40 Ultra and L40s Pro Ultra run on Dreame's AI Sage 11.0 processor. Processing capability for the L40s Pro Ultra isn't specified in available data, but its enhanced object recognition suggests improved computational performance.
Battery and Autonomy
The X40 Ultra carries a 6,400 mAh battery, larger than the 5,200 mAh cells in the L40 Ultra and L40s Pro Ultra. Despite this, runtime sits at 194 minutes for both the L40 Ultra and X40 Ultra, whilst the L40s Pro Ultra manages 220 minutes. The extended runtime on the L40s Pro Ultra likely reflects efficiency improvements rather than just battery size.
For large homes, that extra runtime reduces the need for mid-clean recharging. In practice, 220 minutes covers substantial floor area before returning to the base, making the L40s Pro Ultra better suited to sprawling layouts or whole-home cleaning sessions.
Smart Features
Each robot can climb obstacles up to 22 mm high, with the exception that the L40s Pro Ultra is specified as handling simple steps rather than a precise measurement. This capability helps with door thresholds, thick rugs, and minor floor transitions.
The L40 Ultra and L40s Pro Ultra include a built-in voice assistant, allowing direct interaction without relying solely on external smart home systems. All three models support Alexa and Google Home integration regardless.
Multifunctional Base
Automatic dust emptying, hot water mop washing at 65°C, and hot air drying at 55°C feature across all three bases. Each base holds a 3.2-litre dust bag, 4.5 litres of clean water, and 4 litres of dirty water. Detergent dispensers are included, releasing cleaning solution during the mop washing process.
The L40 Ultra and X40 Ultra use second-generation self-cleaning for the washing tray, whilst the L40s Pro Ultra benefits from third-generation technology. This advancement typically means more thorough cleaning of the base components themselves, reducing maintenance frequency. None of the bases include UV disinfection, though the hot water and hot air approach already addresses hygiene effectively.
Connection kits for plumbing integration are available separately for each model, but none come with built-in water connections as standard. This optional kit eliminates the need to refill and empty tanks manually, though it requires installation and isn't essential for most users.
Dimensions
The X40 Ultra measures 97 mm tall, noticeably lower than the 103.8 mm height of the L40 Ultra and L40s Pro Ultra. That 6.8 mm difference can determine whether the robot fits beneath certain furniture pieces. For homes with low-clearance sofas or bed frames, the X40 Ultra provides better access.
All three robots share a 350 mm diameter, and their bases measure identically at 340 mm wide, 590.5 mm tall, and 456.7 mm deep. The bases require a fair amount of floor space, so planning placement near a power outlet and with enough clearance for the robot to dock is worthwhile.
Real-World Use
The X40 Ultra suits homes where getting under furniture matters most. Its lower profile and larger battery capacity make it ideal for thorough cleaning sessions in spaces with varied furniture heights. The 12,000 Pa suction handles everyday debris well, though it's not the strongest option here.
For pet owners or homes with high-pile carpets, the L40s Pro Ultra's 19,000 Pa suction delivers noticeably better results. The dual brush system and enhanced object recognition mean fewer tangles and better navigation around pet toys or scattered items. The third-generation base self-cleaning also reduces how often you'll need to manually maintain the washing tray.
The L40 Ultra sits between the other two in capability. Its TriCut 3.0 brush manages pet hair effectively, and the 11,000 Pa suction suffices for hard floors and low-pile carpets. The built-in voice assistant adds convenience for hands-free control, and the 194-minute runtime covers most homes without issue.
All three models handle mixed flooring well thanks to automatic mop washing and drying. The hot water approach genuinely improves mopping quality compared to cold water systems, and the ability to remove mops automatically when vacuuming prevents cross-contamination between cleaning modes.
Conclusion: Which to Choose?
Choose the Dreame L40 Ultra if you want solid all-round performance with the TriCut brush for pet hair management, and you value having a built-in voice assistant. It's a capable option for medium-sized homes with mixed flooring and moderate cleaning demands.
Choose the Dreame L40s Pro Ultra if maximum suction power matters, particularly for carpets or homes with pets. The 19,000 Pa performance, extended 220-minute runtime, and third-generation base self-cleaning make it the most capable model here. The 180-object recognition also means fewer interruptions during cleaning cycles.
Choose the Dreame X40 Ultra if fitting under low furniture is a priority. The 97 mm height opens access to spaces the taller models can't reach, and the 6,400 mAh battery ensures thorough coverage even in larger homes. It's the best choice when furniture clearance dictates your decision.
