Discover the reliability of the Security Door Controls RB12V4, a 12V DC, 5Ah backup battery designed specifically for power controllers. This proprietary battery size ensures dependable usability and a steady power supply to your security devices. With a 4000 mAh capacity, it offers quick charging and prolonged operational capability, ensuring you never run out of power. Ideal for maintaining the effectiveness of your security setup, this battery is a must-have for anyone seeking peace of mind. Don't wait, secure your device's power supply today!