At Serea, our mission has always been clear: to completely reinvent the way you experience bike locks. For us, that meant creating a lock that is secure, reliable, and easy to use.
To achieve this, we eliminated two of the most common sources of frustration — physical keys and batteries. With Serea, you’ll never have to worry about losing your keys or remembering to recharge a lock battery ever again.
How does it work without a key?
The Serea lock is a smart lock that is fully operated and managed through the Serea App. This makes your smartphone the only “key” you’ll ever need.
First setup: During the initial registration, you’ll use the PUK code provided on the Serea card included in your package. This unique code verifies your ownership and is permanently linked to your specific lock.
Daily use: Communication between the lock and the app takes place via NFC (Near Field Communication) — the same proven technology used for contactless payments with your phone.
The process: Inside the lock is a dedicated NFC chip whose sole task is to unlock when it receives the correct signal. To trigger this, you simply tap “Click to unlock” in the app and hold your phone’s NFC antenna near the chip inside the lock housing. The lock then opens instantly.
In short, your Serea App account becomes your key, ensuring a seamless and secure unlocking experience.
How does it work without a battery?
The secret lies once again in NFC technology. Unlike traditional electronic locks, Serea doesn’t require its own power source. Here’s why:
When you start the unlocking process, your phone’s NFC antenna transmits tiny bursts of energy to the lock’s chip.
The amount of energy needed is extremely low — around 1 to 15 milliwatts — which is less than what your phone consumes when you take a single selfie.
This small energy transfer is sufficient for the chip to recognize the signal and release the lock. No additional energy is required, since the manual locking process already stores enough preloaded energy in the spring mechanism.
Because of this ultra-efficient design, the Serea lock itself never needs to be charged or powered separately. All you need is your phone, and you’re ready to go.