The answer — one pick, priced
Get the
Aiper Scuba S1
$90 under your budget
The only real robot under $250 — cordless floor and wall cleaning through a 3-micron filter for small pools, at a fifth of the flagship's price.
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Fit ledger — need → measured evidence
■ The catch — co-equal billing, always
It is the weakest robot on this page. Independent testers find real-world runtime falls well short of the rated figure and suction fades as the battery drains; its 3.8-star rating is the lowest in the group; and Aiper's cordless line is the one tied to the CPSC fire-risk recalls. Small and above-ground pools only.
Dealbreaker? Runner-up №1 is a real 4-in-1 cordless for $270 more ↓
■ Every product has a catch. Verdicts that hide it are how bad buys happen.
Runners-up — if your needs differ
Adjacent verdicts — same method
Traps — this verdict avoids
The charging fire
Cordless robots run on lithium-ion. The CPSC recalled roughly 22,000 Aiper Elite Pro units for overheating and short-circuit, and individual charging fires have been reported. Poolbots reports never encountering a corded robot fire.
The suction gap
Battery robots push roughly 2,000 GPH through coarse mesh screens. Corded robots push 4,000-4,500 GPH through 2-micron NanoFiltration. Same price no longer means the same clean.
Phantom coverage
Quoted square footage and pool-length ratings assume a rectangular inground pool. Freeform shapes, steps and sun-ledges cut real coverage, and several cordless units are reported to get stuck on steps.
Provenance — 8 sources, dated
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