Cordless vs corded pool robots compared.
The cable is the most complained-about part of owning a corded pool robot. It tangles, it needs untwisting, and it determines how far the machine can reach.
Cordless models remove that entirely and introduce a different constraint: battery life, and what happens when it runs out mid-clean.
Scuba X1 Pro Max
The cordless case
No cable means no tangling and no untwisting, and for most domestic pools a single charge covers a full clean. The trade is that a bigger pool may need two sessions.
Nautilus CC Plus Wi-Fi
The corded case
Unlimited runtime and consistent power throughout the clean. For larger pools, or anyone who wants to set it going and forget it, the cable remains the more reliable approach.
The cable is a real problem, not a marketing one
A corded robot rotates as it works and the cable twists with it. Over a season that becomes a stiff coil that no longer lies flat, which limits coverage and shortens the cable life.
Swivel fittings help and are worth insisting on. They do not eliminate the issue, and periodically unwinding the cable stays part of ownership.
What battery life actually means in practice
Published runtimes are measured under favourable conditions. Expect less on a dirty pool, where the filter loads up and the motor works harder, and less again as the battery ages.
The practical question is whether a full clean fits inside one charge for your pool size. If it is marginal today it will not be in two years, and a cleaner that needs two sessions is a different proposition from one that does the job in one.
Retrieval and charging
A corded robot is pulled out by the cable. A cordless one has to be lifted, and many park themselves at the waterline for exactly this reason. If yours does not, retrieving it from the bottom of a deep pool is a daily nuisance.
Check how charging works too. Removable batteries are considerably more convenient than carrying the whole machine to a socket, and they mean a failing battery does not end the machine.