The Joysun car jump starter is designed to handle unexpected starting emergencies. Compatible with both 12V and 24V systems, it works for passenger cars and commercial diesel vehicles alike. Equipped with high-rate cells, it delivers powerful instantaneous current to start a stalled vehicle even in -40°C freezing conditions. The high-rate cells provide the surge needed to turn over a cold-soaked engine when traditional batteries fail. With integrated LED lighting and SOS signal, it is an essential safety companion for long road trips and daily commutes. The LED light helps you work under the hood at night, while the SOS signal can alert rescuers in remote areas.