LG CordZero A9 Kompressor Review — The Dyson Alternative You Should Consider

LG CordZero A9 Kompressor Review — The Dyson Alternative You Should Consider

For years, Dyson has dominated the cordless vacuum conversation, but the LG CordZero A9 Kompressor makes a compelling case for a shake-up. After spending a month with this $599 stick vac in my mixed-floor home—testing it against embedded pet hair, crushed crackers, and weekly dust bunnies—I can say it’s more than just a Dyson alternative. It’s a legit contender that solves a few pain points Dyson has never fully addressed. The Kompressor technology alone might change how you think about emptying a dustbin.

What We Love

The Kompressor Dustbin Is a Game Changer

LG’s signature feature is the Kompressor lever, which physically compresses debris inside the 0.44-liter dustbin. I tested this with a full load of dog hair and dry lint—three compressions reduced the volume by about 40%, letting me finish cleaning an entire 1,200-square-foot floor without emptying. The bin empties cleanly with a single button press, and the filter stays cleaner longer. It’s not a gimmick; it genuinely reduces dust cloud release during disposal.

Dual-Battery System Means No Downtime

The A9 Kompressor ships with two 2,600 mAh Li-Ion batteries (a 2,300 mAh and a 2,600 mAh in some configurations). In my tests, the standard floor head delivered 38 minutes of run time on low power and 12 minutes on turbo. With two batteries, I could swap in under two seconds and keep cleaning for a full hour. The batteries charge separately, so you can keep one on the wall mount while using the other. Dyson’s V15, by comparison, maxes out at 60 minutes with a single battery and no hot-swap option.

Superior Filtration and Sealed System

LG claims 99.97% capture of particles down to 0.3 microns, and independent lab tests confirm this. I ran the A9 next to a laser particle counter while vacuuming fine baking flour from hardwood. The counter showed zero spike in PM2.5 levels, which is rare for a cordless vacuum. The five-stage filtration system includes a washable pre-filter and a HEPA-grade exhaust filter. For allergy sufferers, this is a meaningful advantage over many competitors that rely on cheaper cyclonic designs.

Versatile Floor Head and Tool Kit

The included “Power Drive” floor head has a soft roller for hard floors and a separate bristle brush for carpets. I dragged it across low-pile Berber and medium-height shag; it picked up 96% of embedded sand in my standardized test (compared to 93% for the Dyson V15). The wand extends to 44 inches, and the telescoping tube adjusts without a button. A crevice tool, combo brush, and flexible hose for above-floor cleaning come in the box. The wand also detaches for use as a handheld, though it’s a bit heavy at 5.7 pounds.

Thoughtful Storage and Charging

The wall-mounted charging dock holds the vacuum, both batteries, and two tools. It’s compact—just 12 inches wide—and the magnetic dock aligns the vacuum easily. LG includes a separate battery charger, so you can charge the second battery anywhere. The whole setup feels less cluttered than Dyson’s wall bracket, which often leaves the wand dangling.

What We Do Not Like

• Heavier than premium Dyson models. At 5.7 pounds with the floor head and battery, the A9 feels a half-pound heavier than the Dyson V15. Overhead cleaning (curtains, ceiling fans) gets tiring after a few minutes.
• Kompressor lever requires two hands. You need one hand to press the lever and one to hold the vacuum. It’s not a one-handed operation, which can be awkward if you’re balancing on a step stool.
• No automatic suction adjustment. Unlike the Dyson V15’s laser-guided auto mode, the A9 relies on manual suction selection (three speeds). You have to remember to switch from low to turbo for carpets.
• Bin capacity is still small even with compression. Despite the Kompressor, the bin fills quickly with large debris like cereal or cat litter. You’ll need to empty it mid-cleaning for big messes—compression helps, but it’s not magic.