OYEMIA SAT25 cordless pool robot

What the listing actually promises

OYEMIA sells the SAT25 as a cordless robotic vacuum for residential inground pools up to 2,150 square feet. The body is IPX8. The charger is listed as IP67. A 7,800 mAh pack is rated for 180 minutes after roughly four hours on the charger, and the pack is supposed to shut off about ten minutes after it reaches full so it is not left cooking.

Cleaning is push-button. A short press starts a cycle. The LEDs are part of the control scheme: flashing blue for standby, solid blue while it cleans, solid green at full charge, and yellow or purple when the machine thinks it is stuck or drawing too much current. There is no phone app on this listing, which is a feature if you hate pairing and a limit if you wanted to schedule Tuesday mornings from the kitchen.

The route claim is adaptive rather than a named map. OYEMIA says the robot changes its path for the shape of the pool and travels at about 15 meters per minute across the floor, walls, and waterline. Dedicated climbing brushes are the traction story: floors, drains, steps, corners, vertical walls, and the waterline.

Filtration is the real limit

The basket is a snap-lock tray with 300 micron mesh. That will catch leaves, bugs, and a lot of sand. It will not hold the fine haze that makes water look dusty after a windy week. Machines with 180 micron baskets, and a few with a second ultra-fine pad, keep more of that dust in the robot instead of sending it back into the pool.

If your problem is oak leaves and grass, 300 micron is fine and the basket will be easier to rinse. If your problem is silt on a plaster floor, plan on a finer robot or on running the pool filter longer after the SAT25 finishes. Empty the basket before it packs solid. A full 300 micron tray behaves like a clogged one.

Water chemistry and surfaces

The listing limits routine use to chlorine at or below 4 ppm, salt at or below 5,000 ppm, and pH between 7.0 and 7.8, on tile, concrete, or vinyl. That covers a normal residential inground pool, including many salt systems, as long as the salt cell is not running the water like seawater. It does not cover a commercial pool or a pond.

Sharp geometry still matters. Climbing brushes help on ordinary steps and a flush drain cover. They do not repeal physics. A raised main-drain cover, a vanity ledge, or a set of stairs with a sharp nose can still park a small robot. If that is your pool, read the drain and step guides before you buy any cordless model in this size.

Who should pick it

Pick the SAT25 when you want one cordless machine for an inground pool in the stated size, you will rinse a basket, and you accept a one-year warranty plus a short public review trail. It is the robot we put first on the homepage because that job is common and the listing is specific.

Move up to the Beatbot AquaSense 2 if you want surface parking, a finer clean, a much larger review set, and you can lift a heavier machine. Stay with a Dolphin Nautilus CC Plus if you would rather plug in a cable and skip battery anxiety. The WYBOT B1 is the closer cordless alternative when the pool is smaller and edge brushes matter more than a 180-minute claim.