Maytronics Dolphin Proteus DX4 · Polaris Freedom

The tether takes battery replacement and run-time ceilings out of ownership, and puts a 60 ft cable in the pool and a power supply on the deck that has to reach a GFCI-protected outlet without an extension cord.

Cordless convenience trades against session duration: you eliminate cable friction and dock setup, but each charge limits operation to 2.5 hours, unsuitable for pools accumulating heavy debris between maintenance windows.

App connected, but not scheduled: iAquaLink handles mode selection, battery status and cycle-complete alerts, and Polaris lists no scheduling on this platform, so every cycle still starts with someone putting the cleaner in the water.

Pools longer than 50 ft

Maytronics rates the DX4 by pool length, up to 50 ft, and runs it on a 60 ft cable from a deck-side supply. Longer pools sit outside that rating and outside the cable's reach.

Owners who want app control or remote scheduling

The DX4 has no mobile application and no wireless connectivity. Cycles start at the power supply, by hand or on its weekly timer, and there is no status to check from a phone.

Heavy leaf load or silt-laden water

Two-brush capacity caps at moderate debris. Algae-heavy water requires more frequent cartridge changes.

Pools with sustained heavy debris load or peak seasonal influx

2.5-hour runtime cannot sustain multi-hour debris-collection sessions. Large leaf-fall events exceed per-charge capacity without manual pre-cleanup.

Above-ground or zero-depth entry pools requiring wall climb at launch

Wall-climb capability assumes in-ground geometry and waterline access. Deployment limitations differ substantially for above-ground installations.

Owners needing multi-day autonomous operation without intervention

Battery-dependent design requires post-session recharge. Unlike cable-tethered robots, no continuous operation without manual dock return and charge cycle.

Pools larger than 30,000 gallons without staged deployment strategy

Single 2.5-hour session cannot deliver floor-walls-waterline coverage on larger bodies. Multi-cycle strategy necessary; each adds labor and electricity cost.