CTEK RB 4000 Jump Starter Booster (12 V) – up to 4000 A peak, USB-A/USB-C, IP65

CTEK RB 4000 is a compact 12 V jump starter delivering instant starting power for vehicles with a discharged battery. Up to 45 starts on a single charge. It features USB-A and USB-C charging ports (powerbank function) and an integrated warning light with multiple flash programs (including SOS and strobe). Built-in safety includes reverse polarity protection and spark-free operation (10 protection features total).

Note on current ratings: 4000 A is the peak rating; manufacturer data also states starting current 1300 A (max 2060 A).

Key specs: IP65, 239×107×40 mm, net 1.40 kg, detachable 25 cm jump leads, USB-C charging (1 m cable), fast charge ~3.5 h, Li-ion 4×6000 mAh, operating/storage -20…+55 °C. Suitable for 12 V lead-acid batteries: Wet, MF, Ca/Ca, AGM, EFB, GEL.