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Robotic Cleaners

Cordless Robotic Pool Cleaners Compared: Dolphin, Polaris, Aiper, WYBOT

One model from each brand, compared only on the facts each maker publishes on its own spec page or manual. No prices, no star ratings, no "best" pick.

As an Amazon Associate I earn from qualifying purchases. The "Search Amazon" buttons and the "Worth a look" links on this page are Amazon affiliate links; we show no prices or ratings. Facts recorded Oct 25, 2026 from the official sources linked on each section. Manufacturer pages and rules change, so check the current version and your model's manual.

Difficulty: reading spec sheets

Safety first: robots, power supplies and batteries

  • GFCI only. Polaris says its robotic cleaners plug into a GFCI outlet, and Maytronics' U.S. Dolphin LIBERTY safety sheet says the power supply must be on a GFCI-protected circuit. If a GFCI trips by itself, both say not to use the product until the problem is corrected.
  • Distance from the water. The Polaris 9350/9450/9550 manual says to keep the control unit at least 5 ft from the pool edge (U.S. National Electrical Code). Maytronics says to place the LIBERTY battery charger at least 10 ft from the pool edge and at least 4 in above the ground. No extension cords (both makers).
  • Nobody swims with the robot in the pool. Both makers say to take the cleaner out before people get in.
  • Don't open power supplies, chargers or batteries. Polaris says never to open the charging station and not to attempt repair of the cleaner, charging station or cord; Maytronics says the LIBERTY battery is non-replaceable and not to open it. Use the maker's support instead.
  • Impeller blades. Maytronics says to use the impeller safety tool and keep fingers away from the impeller and drive belt.

Sources: Polaris pool cleaners; Polaris 9350/9450/9550 owner's manual; Polaris FREEDOM owner's manual; Maytronics LIBERTY safety instructions (USA)

The question

"Is a cordless robot worth it for my pool, and which brands can I actually buy and get parts for?" We picked one current cordless model per brand and copied only what each maker states. Where a maker's page doesn't say, the table says "not stated." All numbers are the makers' claims; Aiper's page adds that its figures are "obtained in a controlled test environment… Actual performance may vary."

Facts as stated on each manufacturer's page or manual, recorded Oct 25, 2026. "Not stated" = not on the pages we read. Sources are linked below the table.
Spec Dolphin LIBERTY 400 (Maytronics, U.S.) Polaris FREEDOM Aiper Scuba S1 Pro WYBOT C2
Pool type In-ground and above-ground In-ground In-ground Above-ground and in-ground
Size rating Max pool length 33 ft Not stated 2,150 sq ft; 66 ft length Up to 2,152 sq ft
Coverage Floor, walls, waterline Floor/wall/waterline, floor, waterline, SMART modes Floor, wall, waterline, auto, eco modes Floors, walls, waterline
Run time Default cycle 2.5 h; Eco mode splits into short floor-only cycles Up to 2.5 h (floor/wall); 1.5 h floor; 45 min waterline Up to 180 min Up to 180 min (Eco mode)
Charge time Up to 6 h Under 5 h 4 h 3 h
Filtration Combined filter kit; ultra-fine filter kit included All-purpose filter canister, 4 L 180 µm basket + 3 µm MicroMesh; 5 L top-load 180 µm + 10 µm; 3 L
Flow claim Not stated Not stated 6,000 GPH 3,592 GPH
Battery Li-ion 5,000 mAh, 25.2 V, 126 Wh; non-replaceable 9.6 Ah lithium-ion Not stated Not stated
Robot weight 17.861 lb 20 lb Not stated 17.6 lb
Retrieval Click-Up (shake the Clicker in the water); hook Tap & Lift, hook, waterline pick-up notifications Retrieval hook included Auto-parking at the pool edge; hook
App / scheduling MyDolphin Plus app (Bluetooth) iAquaLink app (Wi-Fi); scheduling: no Aiper app (periodic cleaning) WYBOT app; up to 4 cleanings/week
Water / charge temperature Water 43–95 °F; charge 43–95 °F Water 55–95 °F; charge 40–95 °F Not stated Not stated
Warranty (as listed) 3 years Not stated on product page Not stated on product page 2 years
EvenParts link (below) Amazon search Amazon product page Amazon search Amazon search

Source: Dolphin LIBERTY 400 (U.S.); Dolphin LIBERTY user instructions; Dolphin LIBERTY U.S. safety instructions; Polaris FREEDOM; Polaris FREEDOM owner's manual; Aiper Scuba S1 Pro; WYBOT C2

How to read this table

  • Size first. If your pool is longer than 33 ft, the LIBERTY 400's stated maximum doesn't cover it. Aiper and WYBOT rate by square feet; measure your pool's floor area (length × width for a rectangle) and compare.
  • Above-ground pool? Polaris and Aiper list these two models as in-ground; Maytronics and WYBOT list theirs for both.
  • Battery and charging limits matter for cordless. Maytronics and Polaris both state temperature ranges for charging; charge in the shade if the maker says so.
  • Run time isn't cleaning quality. The table shows the makers' claimed times. We haven't tested these robots side by side, so we don't rank them.
  • Parts and support. Before buying, check that the maker publishes a manual and replacement filters for the model. Polaris and Maytronics link their manuals from their product pages; see Robotic pool cleaner replacement parts.

Corded may still fit better

Maytronics says corded robots give continuous cleaning cycles and a long cable, "ideal for larger or extensively used pools." For the corded vs. cordless choice, see Which type of robotic pool cleaner do I need?

Source: Maytronics: Corded or Cordless

What we left out on purpose

  • Prices, sale prices, rebates and star ratings shown on the makers' pages.
  • A "best" pick: we have no sourced, like-for-like test to base one on.
  • Third-party "best robot" rankings and their numbers.
  • Specs the makers' pages list as pending or that we couldn't find.

Should you DIY? / When to call a pro

Fine to DIY: emptying and rinsing filters, checking brushes and tracks for wear, untangling the cable, clearing debris from wheels, and the user-level steps in your manual.

Call the manufacturer or dealer: motor units, power supplies, chargers, batteries, damaged cords and anything else beyond "routine cleaning and maintenance" (Polaris says that work must be done by a qualified professional). Call a licensed electrician: if the outlet isn't GFCI-protected or the GFCI trips by itself.

See our full When to Call a Pro page. Follow your model's manual; this site isn't a substitute for it, and it isn't legal advice.

If your model isn't listed

The numbers on this page come from specific manufacturer documents and models. If your equipment isn't one of them, don't assume the same numbers apply: find the model number on the rating plate, open that model's manual on the manufacturer's site, or contact the manufacturer. You can also email us with the brand and model number.

Facts from the manufacturer (and where else they came from)

Where to look

Robot links are in the “Worth a look” box above. This button covers a small accessory. As an Amazon Associate I earn from qualifying purchases.

  • Telescopic pool pole: used with the retrieval hooks these robots includeSearch Amazon