Cadillock innovative technologies Cadillock innovative technologies
Cadillock 4000 – twice the security: battery monitor with integrated anti-theft device

Cadillock 4000 – twice the security: battery monitor with integrated anti-theft device

  • Protects against a complete discharge of the car battery and thus against battery breakdowns
  • Anti-theft protection caused by electronic immobilizer
  • Interrupts the power supply if the charge level of the battery is dangerously low
  • Keeps enough energy in reserve to start the engine at any time
  • Also suitable when the car is parked for longer periods
  • Increases the lifespan of the battery
  • Easy to use – installation on the car battery in only 3 assembly steps
  • No interference with the vehicle’s electronics
  • Can be combined with already installed alarm systems
  • Extremely low power consumption (only 2 ~ 9 mA)
  • versandkostenfrei
  • für Deutschland & Österreich
Jetzt kaufen

Short description

With its patented digital monitoring system, the Cadillock 4000 constantly checks the minimum voltage level that the vehicle battery must maintain to be able to start the car. As soon as the voltage has fallen short of 11.9 V for a period of more than 60 seconds, the Cadillock 4000 automatically interrupts the vehicle power supply.

Thus the Cadillock 4000 protects your vehicle's battery from falling to a dangerously low state of charge or even being completely discharged, and reserves the necessary battery energy for an engine emergency start. Thus the Cadillock 4000 prevents your vehicle not being able to be started due to a flat battery. 

By interrupting the power supply by the Cadillock 4000 the status of the car battery is very similar to the state that would be achieved by disconnecting the car battery. The electrical current is shut off.

The anti-theft device is activated by remote control. The Cadillock 4000 with its patented circuit configuration separates the battery power supply, thus making it impossible to start the vehicle.  

In contrast to the function of the battery monitor where the power supply, to maintain the necessary power of the battery for an engine emergency start, is completely interrupted, after activating the anti-theft device about 50 amps and a voltage of approx. 12 volts are still available. 

These values are sufficient to secure the stored electronic vehicle data and not to impair the operability of the steering devices – however, it is not possible to start the engine.

  • For all 12 volt vehicles with petrol engine
  • For all 12 volt vehicles diesel engine (displacement to 1.600 cm³)
  • Not suitable for vehicles with start-stop system

Product images

Cadillock 4000Cadillock 4000 - Package contens


There is no interference with the vehicle’s electronics during the installation of the Cadillock 4000. The Cadillock is suitable for vehicles with and without CAN Bus.

The Cadillock 4000 can be installed in just three steps and is particularly easy and cost-effective. Only a wrench and a few minutes’ time are needed.

The Cadillock 4000 is installed directly on the car battery in 3 easy assembly steps: 

  1. Connect the positive cable of the vehicle to the pole of the Cadillock 4000.
  2. Connect the battery clamp of the Cadillock 4000 to the positive pole of the car battery.
  3. Connect the ground cable of the Cadillock 4000 to the negative pole of the car battery.


The Cadillock 4000 can only be installed in 12 volt vehicles that have only one car battery and in which the positive pole and negative pole are freely accessible.

Technical data

Function Block Diagram

Cadillock 4000 Function Block Diagram


- SGS-certified, fireproof, non-flammable fiberglass material
- Completely water- and dust-resistant according to IP66 (International Protection Ratings)
- Dimensions: L: 64 mm x W: 81 mm x H: 25 mm

Operating voltage

9 V ~17 V

Automatic interruption of the voltage

at 11.9 V after 60 seconds

Operational temperature range

The resistance of the internal components is designed for –40 °C to +85 °C.

Storage temperature range

–40 °C to +105 °C

Max. power input

1,200 A

Power consumption

2 ~3 mA before interruption
2 ~3 mA after interruption

Continuous current

200 A

On-state resistance

1.3 mΩ


CE, E24, FCC, RoHS


All Cadillock products at a glance

Cadillock Smart – Einziges Produkt am Markt mit Hightech Batterieüberwachung
Cadillock Classic
Cadillock Stripes
Cadillock Battwatch
Cadillock Marine
Cadillock 3000
Cadillock 4000 bike
Cadillock 4000