A cordless pool cleaner runs on a built-in lithium-ion battery. Charge it, drop it in, press start and lift it out by the handle when the cycle ends. These are the cordless Dolphins by Maytronics: the Liberty, which we ship free, and the EON, which cleans steps and ledges.
Every corded robot asks the same two things of you: route a floating cable across the deck and find a spot for the power supply. A cordless robotic pool cleaner asks for neither. There is nothing to tangle, nothing to trip over and nothing plugged in by the water. The trade is a battery that needs charging between cycles, which is why runtime per charge is the first spec to compare.
Cordless robots vary more than corded ones. Some clean the floor only; the Dolphin Liberty climbs the walls and the EON adds the waterline, steps, corners and sun ledges. Runtime ranges from one cycle per charge to a week of them. Look for inductive charging with no exposed pins to corrode, a pickup mode that brings the robot to the wall, and a warranty that covers the battery.
The four cordless Dolphins, ranked. The Liberty 200 ships free from our warehouse with a 2-year warranty; the Liberty 300, EON 100 and EON 120D are sold through Amazon.
Dolphin’s first cordless robot: floor and walls on in-ground and above-ground pools up to 50 ft on a 1.5-hour charge, Magnetic-Connect charging and a 2-year warranty. Ships free from our warehouse.
Ships free from our warehouse
Up to a week of cycles on one charge, an Eco mode and Click-Up™ pickup that brings the robot to the nearest wall when you shake the rattle. Sold through Amazon.
Sold through Amazon
Cleans steps, corners, sun ledges and the waterline, runs up to 4.5 hours per charge with five modes, DebrisLock™ self-cleaning backwash filtration and Wi-Fi control. Sold through Amazon.
Sold through Amazon
The lowest-priced cordless Dolphin with Wi-Fi: floor, walls, waterline and steps on pools up to 50 ft, up to 2.5 hours per charge and the Maytronics One app. Sold through Amazon.
Sold through Amazon
Cordless wins on convenience. Corded still wins on runtime, filtration, scheduling, warranty and price. Here is the honest comparison.
| Feature | Cordless Dolphin | Corded Dolphin |
|---|---|---|
| Power | Built-in lithium-ion battery, charged between cycles | Low-voltage power supply on the deck, cable to the robot |
| Runtime | One 1.5 hr cycle (Liberty 200) to a week of cycles (Liberty 300) per charge | Unlimited: runs on a schedule all season |
| Coverage | Floor and walls on the Liberty; floor, walls, waterline and steps on the EON | Floor, walls and waterline on every ProLine™ robot |
| Scheduling | App scheduling on the EON; press-to-start on the Liberty | Weekly timer on the Quantum, Premier and Cayman, app on the Sigma |
| Filtration | Top-load basket; DebrisLock™ backwash on the EON 120D | MaxBin™ or Multi-Media™, NanoFilters™ down to 2 microns |
| Setup | Charge, drop in, press start, lift out by the handle | Plug in the power supply, drop in, press start |
| Warranty | 2 years on the Liberty, 1 year on the Amazon EON editions | 2 years on the Max-Series™, up to 3 on the ProLine™ |
| From | $999 | $659 |
| Shop | Shop Cordless | Shop Corded |
The Liberty runs on a built-in lithium-ion battery with two motors, an active brush and CleverClean™ navigation. At 17.86 lb it is one of the lightest Dolphins: carry it to the pool by the handle, drop it in and it scrubs the floor and climbs the walls of in-ground and above-ground pools up to 50 ft on a 1.5-hour cycle.
The Dolphin Liberty lineup ›
The inductive charger snaps onto the back of the robot magnetically: no exposed pins to corrode and no towelling the robot dry first. A full charge takes up to about 6 hours, so most owners charge overnight in a shaded spot. When the cycle ends or the battery runs low, the Liberty parks itself at the wall.
Dolphin Liberty 200 ›
The Liberty 200 runs one 1.5-hour cycle per charge with Standard and Quick Clean modes. The Liberty 300 carries a bigger battery for up to a week of cycles, adds an Eco mode and Click-Up™ pickup: shake the rattle and the robot surfaces at the nearest wall.
Dolphin Liberty 300 ›
The cordless Dolphin EON adds the parts of the pool that collect the most dirt: steps, benches, corners, tanning ledges and safety ledges as shallow as 8 inches, with SmartMap™ navigation and Wi-Fi scheduling through the Maytronics One app. The EON 120D runs up to 4.5 hours per charge with DebrisLock™ self-cleaning backwash filtration.
The Dolphin EON lineup ›The Liberty 200 ships free from our warehouse. The Liberty 300 and both Nautilus EON editions are sold through Amazon.
Dolphin’s first cordless robot: charge it, drop it in, press start.
Ships free from our warehouse
Up to a week of cycles per charge, an Eco mode and Click-Up™ pickup.
Sold through Amazon
Cordless with Wi-Fi: cleans steps, ledges, corners and the waterline.
Sold through Amazon
Up to 4.5 hours per charge, five modes and a self-cleaning backwash filter.
Sold through Amazon
Cordless convenience comes with charging, floor-and-wall coverage on the Liberty and a 1-year warranty on the Amazon EON editions. The corded ProLine™ and Max-Series™ robots below run on a weekly timer all season with commercial-grade motors, NanoFilters™ and up to a 3-year warranty, and every one ships free.
Commercial-grade motors, NanoFilters™ in the box, full waterline cleaning and the longest warranty Dolphin offers: 2 to 3 years.
From $1599
The oversized Gen-2 MaxBin™, HyperBrush™ scrubbing and HyperGrip™ tracks, with a full 2-year warranty on every robot.
From $659
Buy cordless if the cable is the thing that has kept you from using a robot: a deck with no outlet nearby, a long walk from the power supply to the water, a layout where a floating cable snags on steps or a ladder. The Liberty and EON remove that problem completely.
Buy corded if you want the robot to run itself on a schedule all season without a charge in between, if the waterline is your biggest headache, or if you want the finest filtration and the longest warranty. The corded Dolphins start lower in price and go further up in capability. Many owners end up with one of each: a corded flagship on a timer and a cordless robot for a spa or a second pool.
The Liberty 200 and 300 clean the floor and walls, not the waterline, and have no weekly timer: you press start each time. The EON reaches the waterline, steps and ledges and schedules from the app, but the Amazon Nautilus EON editions carry a 1-year warranty against 2 years on the Liberty and up to 3 on the ProLine™. None of the cordless Dolphins use NanoFilters™; the EON 120D’s DebrisLock™ backwash is the finest cordless filtration Dolphin makes.
Charge in a shaded spot, not in direct sun on a hot deck. Run a full cycle rather than many short ones. Store the robot around half charge over winter and top it up every couple of months. A lithium-ion battery treated this way stays healthy season after season, and the Liberty’s battery is replaceable if it ever needs it.
Corded or cordless, Dolphin-only or the whole field: every category page sells the same robots with the comparison that fits the question.
Pool Robots
Every robot pool cleaner we sell
Corded and cordless, from $659
Pool Vacuum Robots
Robotic pool vacuums, no hose
MaxBin™ and NanoFilters™
Corded Robotic Pool Cleaners
ProLine™, Max-Series™, Explorer™
Unlimited runtime, weekly timers
Automatic Pool Cleaners
Robotic vs suction vs pressure
Weekly timers and app control
Electric Pool Cleaners
Plug-in and battery pool vacuums
Low-voltage, about 5¢ an hour
Dolphin Pool Robots
Every Dolphin by Maytronics
Authorized retailer, full warranty
Cordless Dolphin Pool Robots
Liberty 200 & 300, EON 100 & 120D
Dolphin’s battery robots
Corded Dolphin Pool Robots
Premier, Quantum, Sigma, Cayman, Escape, Explorer
Weekly timers, NanoFilters™, 3-yr warranty
Every Dolphin we sell
Nautilus, Wave, open box & more
The full shop
Buy direct from our 10,000+ unit warehouse at unbeatable prices, with price match.
Ships free from our warehouse, usually within one business day.
Simple 30-day returns, plus a full 1–3 year manufacturer warranty on every robot.
Talk to an in-house Dolphin expert before and after you buy.
For most pools we recommend the Dolphin Liberty 200: floor and wall cleaning on pools up to 50 ft, Magnetic-Connect inductive charging, a 2-year warranty and free shipping. Choose the Liberty 300 for a week of cycles per charge, or the EON 120D if you want steps, ledges and the waterline cleaned too.
Per charge: one 1.5-hour cycle on the Liberty 200, up to a week of cycles on the Liberty 300, up to 2.5 hours on the EON 100 and up to 4.5 hours on the EON 120D. Over its life, a lithium-ion battery charged in the shade and stored around half charge over winter lasts for seasons, and the Liberty's is replaceable.
The Dolphin Liberty and EON do. The Liberty scrubs the floor and climbs the walls; the EON adds the waterline, steps, corners and sun ledges. Many other cordless cleaners on the market are floor-only, so check the coverage spec before you buy.
A full charge on the Liberty takes up to about 6 hours through its Magnetic-Connect inductive charger, so most owners charge overnight and run the next day. Three LEDs show the battery level at a glance.
Yes. The Dolphin Liberty 200 and Liberty 300 and the Dolphin EON 100 and EON 120D are cordless. The Liberty 200 is sold here with free shipping; the others are sold through Amazon and Dolphin dealers.
If the cable is what has stopped you from using a robot, yes. If you want set-and-forget scheduling, waterline cleaning, NanoFilter filtration and the longest warranty, a corded Dolphin does more for less money.
You can leave a corded Dolphin in the water between cycles, but Maytronics recommends removing it when it is not cleaning to extend the life of the cable, brushes and seals and to keep it out of chemical shock treatments. Cordless robots come out to charge anyway; most owners lift them by the handle after each cycle.
The Dolphin Liberty 200 ships free with a 2-year warranty. Compare the corded lineup if a weekly timer, the waterline or NanoFilters™ matter more to you.
