Jump Starter WOLFBOX 4000A Portable Car 12V Battery Booster Jumper Box Powerbank. WOLFBOX 3000A/4000A Car Jump Starter Booster Portable Power Bank Air Compressor. 🚗High-capacity 3000A Jump Starter - This car battery jump starter is equipped with a robust 16000mAh battery, making it perfect for 12V vehicles such as cars, trucks, boats, and larger vehicles.