Content overview: “A $249 Smart Lock That Still Opens When You’ve Forgotten to Charge It”. Smart locks promise convenience, but dead batteries can leave you locked out. The new $249 Aqara Smart Lock U300 addresses this with a clever backup: a mechanical key hidden inside the lock itself. Aqara, a Xiaomi-backed smart home company, designed the U300 to work even when its rechargeable battery dies, so you’re never stranded with groceries in hand.
The lock supports Apple Home Key, allowing tap-to-unlock with an iPhone or Apple Watch, and also works with Matter, the new smart home standard that ensures compatibility across ecosystems. This matters because smart home adoption often stalls over reliability concerns—if a device fails at the worst moment, users lose trust. The U300’s backup key and Matter support make it a practical choice for both tech enthusiasts and everyday users. The full version stays on the original page, which this listing opens directly.