CTEK RB 4000 Battery Booster

The CTEK RB 4000 Battery Booster is used to restart discharged 12V vehicle batteries when you have no usable power left. It supplies up to 4000A peak current and supports up to 45 starts per charge, combining strong current delivery with onboard safety controls, USB power outputs and an LED flashlight to give you a compact, multi-purpose power source.Discover the key features of this booster:4000A Peak Current Output: This high-discharge lithium battery system releases a controlled surge of current capable of turning over most 12V engines, as its internal management circuitry regulates voltage and current output to help you achieve a stable start and restore normal operation without strain on the battery or electrical system.Advanced Reverse Polarity Protection: This dedicated protection module monitors clamp connection and automatically isolates the output when the clamps are placed on the wrong terminals, which protects your vehicle s electronics and gives you a more secure process when you are working quickly or in poor visibility.Integrated Spark-Proof Technology: This current-control feature prevents accidental arcing by only permitting power flow once the clamps detect a solid, correct connection, which lowers electrical risk and helps you work with greater confidence during roadside situations or maintenance tasks.USB-A and USB-C Charging Ports: These power outputs draw from the internal high-capacity cell pack and provide regulated charging for phones, tablets and other devices, which supports your everyday connectivity and keeps essential equipment running when you are travelling or working away from mains power.LED Flashlight with Three Lighting Modes: This built-in unit delivers steady, flashing or SOS light through energy-efficient LEDs, which helps you illuminate connection points, navigate dark areas or signal for attention when required.You rely on the RB 4000 Battery Booster to regain starting capability when a flat battery stops your vehicle, supported by its strong current output and layered electronic safeguards. Its combination of jump-start functionality, device charging and lighting helps you manage breakdowns, roadside checks and day-to-day preparation. It is a practical addition to your vehicle setup, giving you a dependable tool that supports regular driving and occasional emergency use.The RB 4000 features a 5 year manufacturers warranty.CTEK RB 4000 Product Information Sheet