Yes, The 12v car jump starter JS-535 is equipped with waterproof and dustproof rating, and the outer casing has double protection.But there are three big precautions to take when jumping a car in the rain: Keep your jumper cables in good shape: Make sure your jumper cables don't have any exposed wires and that they're new enough to have proper insulation. If rain gets inside the cable, it could cause a short circuit.

First locate the USB ports on the side of the 12v jump starter JS-535.The charging port is equipped with a multi-function interface, which can quickly charge mobile phones and other digital products.

Store spare lithium-ion batteries away from anything that can burn.The 12v jump starter JS-535 features nighttime emergency lighting last about 37hours.Calmly respond to emergencies with three lighting modes: lighting, strobe, and SOS rescue.

Yes, it's generally safe—especially if the 12V car jump starter JS-535 is designed with safety in mind. With an IP65 waterproof and dustproof rating, a V0-grade fire-resistant ABS housing, and a lithium battery lifespan of over 1,000 cycles, the device is built to handle extended use, including overnight charging, with enhanced safety and durability.