Quick Answer: The Dolphin Liberty 400 is Maytronics’ app-connected cordless robotic pool cleaner, officially priced at $1,429 (Maytronics.com) to $1,299 (PoolPartz, on sale). It scrubs floor, walls, waterline, and sun ledge on a 2.5-hour cycle, rated for pools up to 33 feet, backed by a 3-year warranty, and controlled through the MyDolphin Plus app — the feature that separates it from the cheaper, app-free Liberty 300. Search results for this model are unusually inconsistent: several older reviews describe a $1,047-$1,099 unit with no waterline cleaning and a 2-year warranty, which was the pre-launch spec, not what Maytronics currently sells.
The Liberty 400 sits at the top of Dolphin’s cordless lineup, above the Liberty 200 and 300, and it’s been named across both of those models’ own review pages for weeks without a dedicated page of its own. Pricing it out turned up something more interesting than a simple gap-fill: a real split between what independent reviewers wrote about this model before launch and what Maytronics actually ships today.
Dolphin Liberty 400 at a glance
| Spec | Dolphin Liberty 400 (2026) |
|---|---|
| Type | Cordless, battery-powered robotic pool cleaner |
| Cleans | Floor, walls, waterline, and sun ledge (to about 11 in depth) |
| Max pool length | 33 ft |
| Default cycle time | 2.5 hours |
| Suction rate | About 4,000 GPH |
| Charging | Magnetic-Connect inductive charging |
| Filter | Combine Filter Kit, with fine and ultra-fine interchangeable cartridges |
| App control | Yes — MyDolphin Plus (the Liberty 300 has none) |
| Modes | Eco Mode, Click-Up sound-activated retrieval |
| Weight | About 17.9 lbs |
| Warranty | 3 years |
| Price | $1,299 (PoolPartz sale) to $1,429 (Maytronics.com) |
Dolphin Liberty 400
- Cleans floor, walls, waterline, and sun ledge in one 2.5-hour cycle — the same full routine as the Liberty 300, plus app control.
- MyDolphin Plus app and a 3-year warranty are what actually set it apart from the cheaper Liberty 300.
- Rated for pools up to 33 ft — check that ceiling before buying, since it's the same as the smaller Liberty models despite the higher price.
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By the numbers
- Official price: $1,429 on Maytronics’ own US store (SKU 99998140-US), against $1,299 at PoolPartz on sale — both a long way from the $1,047-$1,099 figures still floating around in older reviews of this model.
- Cycle time: 2.5 hours per Maytronics’ current spec page, covering the full floor-walls-waterline-sun-ledge routine on one charge. A handful of retailer listings still show a stale 1.5-hour figure, the same leftover-copy pattern already found on the Liberty 200’s listings.
- Warranty: 3 years, per Maytronics and Sunplay — a year longer than the Liberty 300’s 2-year coverage, and one of the reasons the 400 costs more.
- Weight: 17.9 lbs, light enough for one-person Click-Up removal.
The spec-sheet trap: which Liberty 400 are you reading about?
Search “Dolphin Liberty 400” and you’ll land on reviews with wildly different numbers. RoboticReviews’ writeup lists a $1,047 price, a 1.5-hour cycle, a 2-year warranty, no waterline cleaning, and a 50-ft pool rating — and says outright the product hadn’t shipped yet when the review was written. Maytronics’ own current listing, cross-checked against a second retailer (PoolPartz) and The Pool Nerd’s 2026 roundup, agrees on a different unit entirely: $1,299-$1,429, a 2.5-hour cycle, a 3-year warranty, waterline-and-sun-ledge coverage, and a 33-ft pool rating.
That’s not a typo on one side — it’s a pre-launch spec sheet still circulating for a model that changed before it reached retail. If you see a Liberty 400 quoted under $1,100 with no waterline cleaning, you’re reading about the version that never actually shipped. Budget against Maytronics’ current numbers instead.
What it does well
App control, finally. The Liberty 400 is the first cordless Dolphin at this price point to add MyDolphin Plus — the feature the cheaper Liberty 300 simply doesn’t have.
Full floor-walls-waterline-sun-ledge coverage. Per Maytronics’ current spec page, it handles the same complete routine as the Liberty 300, including the sun ledge down to about 11 inches of depth.
Longer warranty. At 3 years, it beats the Liberty 300’s 2-year coverage and most cordless competitors from Aiper, Beatbot, and WYBOT.
Where it falls short
- Same 33-ft ceiling as cheaper Liberty models. Despite costing $100-$330 more than the Liberty 300, it doesn’t clean a bigger pool — the app and warranty are the entire upgrade.
- Real price confusion online. Between the pre-launch reviews still indexed and the retailer spread, expect to see numbers from $1,047 to $1,429 for what are, in practice, different specs.
- 2.5-hour cycle, then recharge. Same limitation as every cordless Dolphin — one session per charge, and a full recharge takes hours.
- No user-swappable battery. Like the rest of the Liberty line, a dead battery means an out-of-warranty repair, not a quick swap.
Dolphin Liberty 400 vs the rest of the Liberty line
| Model | Cleans | App | Warranty | Price |
|---|---|---|---|---|
| Dolphin Liberty 200 | Floor and walls only | No | 2 years | $899-$949 |
| Dolphin Liberty 300 | Floor, walls, waterline, sun ledge | No | 2 years | $1,199-$1,249 |
| Dolphin Liberty 400 | Floor, walls, waterline, sun ledge | Yes — MyDolphin Plus | 3 years | $1,299-$1,429 |
The honest read: the Liberty 300 and 400 clean identically. The entire $100-$230 gap between them buys app control and one extra year of warranty, nothing more. Compare the whole Dolphin range in our best Dolphin pool cleaner guide, or see how the Liberty line stacks up against Aiper, Beatbot, and WYBOT’s cordless models in our best cordless robotic pool cleaner guide.
Who should buy the Dolphin Liberty 400
Buy it if you want a cordless Dolphin with app scheduling and don’t mind paying a premium for it, or if the extra warranty year matters given that a replacement Liberty battery runs over $1,000 out of warranty (see our Dolphin pool cleaner parts guide for that math).
Skip it if you’re comfortable starting cycles manually — the Dolphin Liberty 300 cleans the exact same floor-walls-waterline-sun-ledge routine for $100-$230 less. And if your pool is over 33 feet, none of the Liberty models fit; look at the corded Nautilus CC Plus instead, which covers 50 feet for roughly $550-$680 less than the Liberty 400.
The bottom line
The Dolphin Liberty 400 is a capable cordless cleaner with a real, meaningful upgrade over the Liberty 300 — the MyDolphin Plus app and a 3-year warranty — at $1,299-$1,429. Just be sure you’re comparing it against Maytronics’ current spec sheet, not one of the pre-launch reviews still ranking online with a completely different price and feature set. For most cord-haters, the app is a nice-to-have rather than a must-have; if you don’t need it, the Liberty 300 delivers identical cleaning for less. See the full lineup in our best Dolphin pool cleaner guide.