Comparison
Cordless vs Corded Robotic Pool Cleaners: Which Is Right for You?
Battery robots skip the cable; corded robots never run flat. We explain the real trade-offs in runtime, maintenance, pool size and cost, with examples from each side.
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Beatbot
Beatbot Sora 30
8.1/10 research scoreUp to 5 hours on the floor from a 10,000 mAh battery.
Dolphin
Dolphin Nautilus CC Plus
7.5/10 research scoreA 2-hour cycle on a 60 ft swivel cable, no battery.
Polaris
Polaris 9650iQ Sport
8.2/10 research scoreCorded with a 70 ft cable and app scheduling.
The short answer
Cordless suits most residential pools now that robots like the Beatbot Sora series run up to 5 hours. Corded still makes sense for very large pools, owners who want no battery to replace, and anyone who wants the robot to run cycle after cycle.
Robotic pool cleaners come in two kinds. Corded robots get low-voltage power through a floating cable from a power supply beside the pool. Cordless robots carry a lithium-ion battery. Both clean far better than suction or pressure cleaners, but they suit different owners.
Side by side
| Factor | Cordless | Corded |
|---|---|---|
| Runtime | Limited by the battery, typically 1.5 to 5 hours | Unlimited; runs a set cycle (often 1.5 to 2.5 hours) and can repeat |
| Setup | Drop it in | Unroll the cable and plug in the power supply |
| Cable tangles | None | Possible, reduced by swivels |
| Charging | 3 to 5 hours between cleans | None |
| Long-term wear | Battery loses capacity over seasons | No battery to replace |
| Very large pools | Some models rated to about 3,200 sq ft | Long cables reach large pools |
Specs of real examples
| Spec | Beatbot Beatbot Sora 30 | Dolphin Dolphin Nautilus CC Plus | Polaris Polaris 9650iQ Sport | Dolphin Dolphin Liberty 400 |
|---|---|---|---|---|
| Research score | 8.1/10 research score | 7.5/10 research score | 8.2/10 research score | 7.3/10 research score |
| List price | $999 | Not published | Not published | Not published |
| Cleaning coverage | ||||
| Floor cleaning | Yes | Yes | Yes | Yes |
| Wall cleaning | Yes | Yes | Yes | Yes |
| Waterline cleaning | Yes | No | Yes | Yes |
| Surface skimming | No | No | No | No |
| Cleaning modes | 4 modes (best) | Not published | 3 modes | Not published |
| Max pool area | 3,230 sq ft | Not published | Not published | Not published |
| Filtration | ||||
| Filter type | Top-load filter basket | Top-access fine filter kit | Top-load canister | Not published |
| Finest filtration | 150 µm | Not published | Not published | Not published |
| Filter capacity | 5.2 L (best) | Not published | 5 L | Not published |
| Battery and power | ||||
| Battery capacity | 10,000 mAh (best) | Not published | Not published | 5,000 mAh |
| Runtime (floor only) | 300 min (best) | Not published | Not published | 150 min |
| Maximum runtime | 300 min (best) | 120 min | Not published | Not published |
| Charging time | 4.5 h | Not published | Not published | Not published |
| Wireless charging | No | Not published | Not published | Yes |
| Cable length | Not published | 60 ft | 70 ft (best) | Not published |
| Navigation and smart features | ||||
| Navigation | S-path with SonicSense ultrasonic obstacle avoidance (13 sensors, 2 ultrasonic) | Not published | Not published | Not published |
| App control | Yes | No | Yes | Not published |
| Wi-Fi | Yes | Not published | Not published | Not published |
| Bluetooth | Yes | Not published | Not published | Not published |
| Scheduling | Not published | Yes | Yes | Not published |
| Ease of use | ||||
| Surfaces for retrieval | Yes | Not published | Not published | Not published |
| Weight | 19.6 lb | 20.8 lb | Not published | 17.9 lb (best) |
| Dimensions | 17.09 × 15.20 × 10.51 in | 16.8 × 16.4 × 10.4 in (42.7 × 41.6 × 26.5 cm) | Not published | Not published |
| Caddy included | Not published | Not published | Yes | Not published |
| Warranty and support | ||||
| Warranty | 2 years | 2 years | Not published | 3 years (best) |
| Where to buy | Check price at Beatbot (opens in a new tab) | View at Maytronics (opens in a new tab) | View at Polaris (opens in a new tab) | View at Maytronics (opens in a new tab) |
When cordless is the better choice
- You want to drop the robot in without unrolling a cable.
- Your pool has features a cable can snag on.
- You want surface skimming (cordless models like the Beatbot Sora 70 and Aiper X1 Pro Max can float and skim).
Runtime used to be the problem. It mostly isn't any more: the Beatbot Sora series is rated for up to 5 hours on the floor.
When corded is the better choice
- You want the robot to run whenever you like, with no charging.
- You don't want to replace a battery after a few seasons.
- Your pool is very large, and a 60 to 70 ft cable reaches every corner.
The hidden costs
Batteries age. Lithium-ion cells lose capacity over time, faster if stored empty or in heat, and makers rarely publish how many cycles they last. A corded robot avoids that but has its own wear item: the cable, which can be replaced.
Our take
For most residential pools, a good cordless robot is now the more convenient choice. Pick corded if you run your robot daily, have a very large pool, or simply don't want to think about batteries.
Not sure which robot fits your pool?
Answer five quick questions and see the models that match your pool type, size and budget.
Frequently asked questions
Are cordless pool robots as good as corded ones?
How long do cordless pool robot batteries last?
Can a corded robot cable be a safety problem?
Sources
Specs, prices and claims in this article come from these sources.
- Beatbot Sora 30 specifications · Beatbot · accessed Oct 16, 2026
- Dolphin Nautilus CC Plus specifications · Maytronics · accessed Oct 16, 2026
- Polaris 9650iQ Sport · Polaris · accessed Oct 16, 2026
Written by
Research and editing
The PoolRobots editorial team researches robotic pool cleaners from manufacturer documents, published measurements and owner reports.
