AstroAI S8 Car Battery Jump Starter, Car Jumper Starter Battery Pack for Up to 6.0L Gas & 3.0L Diesel Engines, 12V Portable Jump Box with 3 Modes Flashlight and Jumper Cable(Yellow)

I ordered this AstroAI S8 battery a little over a year ago. Its primary purpose would be to have an option for jumpstarting the battery in my 2004 Lexus ES330, and its secondary purpose would be to have an option for charging my phone or other portable electronic devices. At that time in late 2024, I was transitioning to a new vehicle but was keeping the 2004 Lexus as a backup. Because I wouldn't be driving the 2004 Lexus much, I felt the need to have an external battery option for jumpstarting the car battery. I haven't had to use this until now, but man am I glad I had this. After fully charging it when I received it, it had been sitting in the vehicle unused for the past 12+ months. I don't recall if I ever recharged it during the past 12 months. Regardless though, it seemed to hold a charge pretty well. I had to use it this past weekend and it appeared fully charged. The first attempt at starting the car was unsuccessful, and it did use up ~25% of the battery. I was worried that the issue wasn't a dead battery but something more significant. However, after exploring other possibilities, I decided to give the jumpstart another shot. This time it worked perfectly and the engine started up! This was really easy to use and it came in clutch. Nothing more I could ask for. Just be aware that each attempt at jumpstarting may use about 25% of the charge, so realistically you have 4 attempts at most before this external battery is drained.

This AstroAI car battery jump starter works great and is easy to use. It’s compact, well made, and gives peace of mind in emergency situations. It starts the car quickly and holds a good charge. Overall, a very useful tool to keep in the vehicle and great value for the price.

Used it a few times. Worked beautifully,would buy again.

Works solid. Purchased 2 for our car/truck safety kits. Glad I got them. They also charge many otber things with its USB ports.

Used for the first time in the Texas cold of 55 degrees. Had a full charged and took two attempts as first time pressing boost only slowly spun motor. Second time pressing boost it spun my motor fine but only showed 25% battery remaining. Had no trouble starting a 6.2L gas v8 with moderate aftermarket cam Worth the buy for the price and can comfortably say it should have no problem starting most normal v8 trucks

Great product. Powerful and working well.

i’ve had this in the back of my car since i bought it as a fail-safe. ended up needing it after letting my car sit for a month, and learned it only has one charge. so, not bad for the price. it definitely did the job, but you only have the chance at one crank when jumping your car, we had to let it charge and then try again the next day and then it worked. so, make sure it’s fully charged at all times and you’ll be good.

Worked like a charm the 1st time I needed it to jump my wife's SUV.. Glad I purchased it .