Winner
33% OFF
$499.98
$749.99
Updated October 2026
Data from the official Dreame and Shark sites.
2026 verdict
Because it mops, washes and dries its own pads and carries a three-year warranty, the Dreame L40 Ultra Gen 2 is the better robot of this pair.
It is rated at 25,000 Pa and 231 minutes, well ahead of the 110 minutes of the Shark PowerDetect Self-Empty, and it also has the larger onboard bin at 250 ml against 189 ml. The Shark PowerDetect Self-Empty remains the cheaper machine and a capable dry cleaner, with NeverStuck lifting over thresholds and a bagless HEPA base rated for about a month of debris. Choose the Dreame L40 Ultra Gen 2 for hard floors and hands-off maintenance, and the Shark PowerDetect Self-Empty for vacuuming on a budget.
Works with
Connectivity
- Wi-Fi 2.4 GHz
vs
27% OFF
$399.99
$549.99
Works with
Connectivity
- Wi-Fi 2.4 GHz
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| Feature | Dreame L40 Ultra Gen 2 | Shark PowerDetect Self-Empty | Winner |
|---|---|---|---|
| Price | $499.98 | $399.99 | Shark PowerDetect Self-Empty |
| Rating | 4.4 | 3.8 | Dreame L40 Ultra Gen 2 |
| Warranty | 3 years | 1 year | Dreame L40 Ultra Gen 2 |
| Battery Life | 231 minutes | 110 minutes | Dreame L40 Ultra Gen 2 |
| Integrations | Google Home, Alexa, Apple HomeKit, Samsung SmartThings, Home Assistant, Matter | Google Home, Alexa, Home Assistant | Dreame L40 Ultra Gen 2 |
| Mopping Functionality | YES | NO | Dreame L40 Ultra Gen 2 |
| Auto Mop Washing | YES | NO | Dreame L40 Ultra Gen 2 |
| Auto Mop Drying | YES | NO | Dreame L40 Ultra Gen 2 |
| Onboard Dustbin Capacity | 250ml | 189ml | Dreame L40 Ultra Gen 2 |
| Auto Recharge | YES | YES | Tie |
| Connectivity | 2.4 GHz WiFi | 2.4 GHz WiFi | Tie |
| Navigation Type | Laser (LiDAR) | Laser (LiDAR) | Tie |
What the differences mean
Mopping
The Dreame L40 Ultra Gen 2 mops, washes its pads at the dock and dries them with hot air. The Shark PowerDetect Self-Empty has no mop or water tank, so it is a dry-cleaning robot only.
Warranty
Dreame covers the L40 Ultra Gen 2 for three years and Shark covers the PowerDetect Self-Empty for one. On a robot with a washing dock and moving parts, that is a meaningful difference in cover.
Runtime
The Dreame L40 Ultra Gen 2 is rated for 231 minutes per charge and the Shark PowerDetect Self-Empty for 110, roughly double, which matters in a larger home or when mopping is added to the run.
Dock capacity
The Dreame L40 Ultra Gen 2 empties into a 3.2 L bag, while Shark does not publish the base capacity of the PowerDetect Self-Empty and instead rates it for about 30 days of debris.
Smart home support
Both work with Alexa and Google Home, and the Shark PowerDetect Self-Empty also reaches Home Assistant. The Dreame L40 Ultra Gen 2 adds Apple Home, Samsung SmartThings and Matter once its announced over-the-air update lands.
Which one to buy if
- your floors need mopping as well as vacuuming
The Dreame L40 Ultra Gen 2 washes and dries its own pads and lifts them over carpet.
- you have a large home or run the robot twice a day
It is rated for 231 minutes per charge, more than double the 110 minutes of the Shark PowerDetect Self-Empty.
- you only need vacuuming and want to spend less
The Shark PowerDetect Self-Empty is the more affordable machine, with a bagless HEPA base and NeverStuck mobility.
- you want the longest warranty
The Dreame L40 Ultra Gen 2 carries a three-year warranty against one year on the Shark.
Winner
33% OFF
$499.98
$749.99
- + Rating: 4.4
- + Warranty: 3 years
- + Battery Life: 231 minutes
- - Price: $499.98 vs $399.99
27% OFF
$399.99
$549.99
- + Price: $399.99
- - Rating: 3.8 vs 4.4
- - Warranty: 1 year vs 3 years
What owners say
Owners of both robots describe a routine that needs little attention, then name opposite reasons. Dreame L40 Ultra Gen 2 owners centre on the dock, saying the self-emptying, self-washing and hot-air drying make daily cleaning almost completely hands-off, and they praise the 25,000 Pa suction, the extendable side brush that reaches corners, and fast multi-floor mapping. Their recurring complaints are hair tangling in the wheels or brush, mop pads detaching for a few users, and an app with a real learning curve; the detergent dispenser is also sold separately. Shark PowerDetect Self-Empty owners focus on reliability, crediting NeverStuck lifting for clearing thresholds and the bagless HEPA base for a month between empties, while calling the SharkClean app basic and reporting Wi-Fi pairing trouble on setup.
Frequently Asked Questions
Which is better overall: Dreame L40 Ultra Gen 2 or Shark PowerDetect Self-Empty?
The Dreame L40 Ultra Gen 2, which mops, washes and dries its own pads, is rated for 231 minutes and carries a three-year warranty. The Shark PowerDetect Self-Empty is the cheaper vacuum-only option with a bagless HEPA base.
Does the Shark PowerDetect Self-Empty mop?
No. The Shark PowerDetect Self-Empty is a vacuum-only robot with no mop or water tank. The Dreame L40 Ultra Gen 2 is the model in this pair that mops and washes its pads.
What is the biggest difference between the Dreame L40 Ultra Gen 2 and the Shark PowerDetect Self-Empty?
Mopping and runtime. The Dreame L40 Ultra Gen 2 washes and dries its own pads and is rated for 231 minutes, while the Shark PowerDetect Self-Empty only vacuums and is rated for 110 minutes.
Does the Dreame L40 Ultra Gen 2 include the detergent dispenser?
No. The Dreame L40 Ultra Gen 2 is detergent compatible, but the automatic dispenser is sold separately rather than included in the box.
Who should buy the Dreame L40 Ultra Gen 2?
Homes with hard floors that want hands-off mopping and a self-cleaning dock, multi-floor layouts, and buyers who value a three-year warranty.
Who should buy the Shark PowerDetect Self-Empty?
Buyers who only need vacuuming, want NeverStuck mobility over thresholds, a bagless HEPA base and a lower price.
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