Both are cordless Maytronics Dolphin cleaners, and the right one comes down to your pool. The Liberty 400 is built for in-ground pools up to 10 by 5 metres and cleans the floor, walls and waterline. The Liberty 600 goes up to 15 metres, works in-ground or above-ground, and adds the steps and lounge areas, with a bigger battery.
Here are the facts side by side, the honest pros and cons of each, and which fits which pool.
Side by side
| Feature | Liberty 400 | Liberty 600 |
|---|---|---|
| Pool size | In-ground, up to 10 x 5 m | In-ground and above-ground, up to 15 m |
| Cleans | Floor, walls, waterline | Floor, walls, waterline, steps, lounge areas |
| Battery | 5,000 mAh lithium-ion | 9,800 mAh lithium-ion |
| Runtime | 2.5-hour standard cycle | Up to 4.5 hours, 3-hour default cycle |
| Surfaces | Liner, gunite, concrete, tiles, fibreglass | Liner, vinyl, gunite, stainless steel, ceramic, mosaic, fibreglass |
| Shapes | Rectangular, round, freeform, kidney | Rectangular, round, freeform, kidney |
| Filtration | Combine filter plus ultra-fine kit, interchangeable | Multi-layer dual-panel cartridge, coarse and fine, top-access |
| App | MyDolphin Plus (Bluetooth and Wi-Fi) | Maytronics One |
| Charging | Inductive Magnetic-Connect, 180W | Inductive Magnetic-Connect, 180W, weatherproof connector |
| Retrieval | Click-Up sound sensor | Click-Up and Click to Stop pole |
| Eco mode | Floor-only weekly cycles | Short cycles, clean up to 2 weeks per charge |
| Weight | 8.1 kg | 11.7 kg |
| Warranty | 3 years | 3 years limited |
| Recognition | Maytronics Dolphin line | TIME Best Inventions 2025 |
Specs are as listed at the time of writing. Check the live pages for current price and stock: Liberty 400 and Liberty 600.
What they share
Both climb the wall to you when they finish, so neither needs fishing off the bottom. The shared parts are the quality and the convenience. The differences are about scale and coverage.
Where they differ
Three differences decide it.
The 400 is for pools up to 10 by 5 metres. The 600 reaches 15 metres and is rated for above-ground pools as well as in-ground.
The 400 cleans floor, walls and waterline. The 600 adds the steps and lounge areas, which most cordless cleaners skip.
The 400 runs a 2.5-hour cycle on a 5,000 mAh battery. The 600 has a 9,800 mAh battery and up to 4.5 hours of runtime, so it covers more per charge.
The 600 also takes a wider range of surfaces, including stainless steel, ceramic and mosaic, and it is heavier at 11.7 kg against the 400’s 8.1 kg.
What you get, each one
Dolphin Liberty 400
Cordless, for medium to large in-ground pools up to 10 by 5 metres. Cleans floor, walls and waterline on a 2.5-hour cycle, with interchangeable coarse and ultra-fine filters.
Pros
✓ Lighter at 8.1 kg
✓ Straightforward floor, wall and waterline coverage
✓ Interchangeable filtration for leaves or pollen
✓ Cordless, 3-year warranty
Cons
× Does not clean steps or lounge areas
× Size ceiling of 10 by 5 metres
Dolphin Liberty 600
Cordless, for pools up to 15 metres, in-ground or above-ground. Cleans floor, walls, waterline, steps and lounge areas, with up to 4.5 hours of runtime. Named one of TIME’s Best Inventions of 2025.
Pros
✓ Full coverage, including steps
✓ Larger battery, longer runtime
✓ Works above-ground too
✓ Very wide surface range
Cons
× Heavier at 11.7 kg
× More cleaner than a small or simple pool needs
Which one suits your pool
Choose the Liberty 400 if
Your pool is in-ground and up to 10 by 5 metres, and you want floor, walls and waterline cleaned without a cord. For a typical family pool with no steps to scrub, it is the right fit.
Choose the Liberty 600 if
Your pool is larger, up to 15 metres, or above-ground, or it has steps and lounge areas you want cleaned. If you want the longest runtime and the widest surface range, it is the one.
Still unsure? Tell us your pool size, surface and shape, and whether the steps matter, and we will point you to the right one.
Why buy either from Blue Cube Direct
Dolphin cleaners are built by Maytronics, which has made robotic pool cleaners since 1983 and sets the category benchmark. The range is supplied in the UK through Certikin, the country’s largest pool-equipment distributor, so parts and warranty support are easy to get. Buy from Blue Cube Direct and the same engineers who build and service pools are the ones you call if anything is not right, with a UK warranty and local support.
Common questions
+ What is the main difference between the Liberty 400 and 600?
Size and coverage. The 400 cleans in-ground pools up to 10 by 5 metres (floor, walls and waterline). The 600 reaches 15 metres, works above-ground too, and adds step and lounge cleaning.
+ Does the Liberty 400 clean steps?
No. The 400 cleans the floor, walls and waterline. For steps and lounge areas, the 600 is the one.
+ Which is better for an above-ground pool?
The Liberty 600, which is rated for in-ground and above-ground pools. The 400 is for in-ground pools.
+ Which suits a 12-metre pool?
The Liberty 600, which is rated up to 15 metres. The 400’s ceiling is 10 by 5 metres.
+ Are both cordless, and how are they charged?
Yes, both are cordless and recharge on an inductive magnetic connector. The 400 has a 5,000 mAh battery, the 600 a 9,800 mAh battery.
+ Do both come with a warranty?
Yes, both carry a 3-year Maytronics warranty, excluding wear items like brushes and filters.
Find the right cleaner for your pool
Tell us your pool size and surface and we will match one to it, or browse the whole range.
Discover the range of pool cleanersLiberty 400 Liberty 600 Get in touch
Written by the engineering team at Blue Cube Direct.
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