Cordless vs. corded pool robots: an honest comparison

Battery convenience vs. unlimited runtime, and which pools each suits.

By The PoolBot Guide team · Oct 23, 2026

Five years ago almost every robotic pool cleaner had a cord. Now cordless models dominate new launches. Neither is simply better. Here’s the trade-off.

The case for cordless

No cable means no tangles, nothing running across the deck, and a robot you can drop in any time. Battery runtimes have grown: Beatbot rates the AquaSense 2 at up to 4 hours on the floor,^[1] and Maytronics’ cordless Dolphin Liberty 400 runs a 2.5-hour cycle.^[4] For most residential pools that’s plenty for one full clean.

The case for corded

A corded robot never runs flat halfway through. It takes power from a poolside supply, so there’s no battery to degrade over the years and nothing to recharge. The Dolphin Nautilus CC Plus runs a 2-hour cycle on a 60 ft swivel cable in in-ground pools up to 50 ft, for $829.^[5]

Cost over time

Batteries age. Ask what a replacement battery costs and whether the maker sells one. A corded robot’s weak points are the cable and swivel, which are usually cheaper to replace.

Who should get which

• Busy owners who want no-fuss drop-in cleaning: cordless.
• Large in-ground pools, daily runs: corded, or a long-runtime cordless.
• Leafy yards: consider a robot that also skims the surface, like the AquaSense 2 Ultra.^[2]

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