Sleeping Battery CR2032 Relay Attack Prevention for Car Key Fobs Twin Pack

Sleeping Battery CR2032 Relay Attack Prevention for Car Key Fobs Twin Pack

Twin pack.

A “sleeping battery” is a special key‑fob battery with a built‑in motion sensor that disables the key’s wireless signal after about 3 minutes of no movement, protecting keyless‑entry cars from relay‑theft attacks.

What a Sleeping Battery Does

• Contains an integrated motion sensor.
• After 3 minutes of stillness, it puts the key into sleep mode, stopping all signal transmission.
• Wakes instantly when the key is moved or a button is pressed.

Why It Exists

• Keyless entry vehicles constantly broadcast a low‑power signal.
• Thieves use inexpensive relay devices to extend this signal from inside your home to your car.
• Sleeping batteries cut the signal when the key is stationary, blocking this method.

Compatibility

• Works with most car keys using CR2032 or CR2450 batteries.
• Suitable for cars and motorcycles with keyless systems. 
• Jaguar & Land Rover have distributed them to customers as part of anti‑theft upgrades.

Battery Life & Use

• Lasts about as long as a normal key‑fob battery under typical use.
• Battery life is longest when the key can remain still and enter sleep mode.
• Not rechargeable; replace when depleted. 

Installation

• Installed exactly like a normal key‑fob battery—open the fob and swap it in.
• A sleeping battery is a simple, low‑cost upgrade that significantly reduces the risk of relay‑theft for keyless‑entry vehicles.

Keyfob Repair

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