Dreame X40 Ultra vs Lefant M3 Series Robot Vacuum

The Dreame X40 Ultra roams your home autonomously, using LiDAR navigation to map multiple floors and target high-traffic zones. Its built-in self-emptying dustbin holds up to 0.5 L of debris, so you can go weeks without manual emptying. When switched to mopping mode, retractable pads glide over hardwood, tile, and laminate, delivering a consistent damp clean. All functions are controlled via the Dreame app, allowing scheduling, no-go zones, and real-time status updates.

The M3 Series is Lefant's mid-range robot vacuum and mop line, sold as four tiers that share the same hot rotating mop system and self-emptying dock but differ in suction, water temperature and runtime. The entry M3 runs 12,000Pa and 55C mops with a 220-minute battery; the M3 Max steps up to 20,000Pa and 55C mops; and the flagship M3 Ultra reaches 23,000Pa with 70C hot rotating mops and 210 minutes of runtime. The common thread is hot-water mop washing, which matters because warm water lifts dried spills that cold water smears, and 8-week dust storage in the base so the bag only needs changing every couple of months. Lefant sells direct and bundles a 180-day accessory pack with official-store orders.

• Hands-free cleaning with self-emptying base
• Dual vacuum-and-mop functionality
• Accurate LiDAR mapping for multi-level homes
• Full app control and smart-assistant compatibility

• Hot-water mopping at a price well below flagship brands
• Very long runtime across the range
• 8-week dust capacity means rare manual intervention
• Tiered lineup lets you pay only for the suction you need

• Higher upfront cost than basic robot vacuums
• Mopping pads require regular cleaning
• Base station is bulky for small apartments

• Stock availability varies by tier, with the Ultra frequently out of stock
• Suction figures are not directly comparable with other manufacturers' ratings
• Brand support and app polish trail the premium robot vacuum makers