The **AstroAI S8 Pro Car Battery Jump Starter** is a powerful and versatile tool designed to help you get your vehicle started in case of a dead battery. With a peak output of **3000A**, it is built to jump-start large gas and diesel engines, making it an excellent option for a wide range of vehicles, from cars and trucks to RVs and boats. Here’s a detailed review of its features and performance:### **Key Features:**1. **High Power Capacity:**- The **3000A peak power** is more than enough to jump-start **up to 9.0L gas engines** and **7.0L diesel engines**, which makes this jump starter suitable for most vehicles, including trucks, SUVs, and large diesel engines. It’s ideal for anyone who drives larger vehicles or needs a reliable backup for their car battery.2. **Multiple Charging Modes:**- The **AstroAI S8 Pro** is equipped with three useful modes for added versatility: **Jump Start Mode**, **Charging Mode**, and **Flashlight Mode**. The jump-start mode is specifically for jump-starting dead batteries, while the charging mode can be used to power up devices like smartphones, laptops, or tablets via the USB ports. The built-in flashlight has three lighting modes—**steady**, **strobe**, and **SOS**—for emergency situations or nighttime use.3. **Large Battery Capacity:**- It comes with a **24,000mAh lithium battery**, which ensures you have plenty of power on hand for multiple jump starts, as well as for charging small electronic devices. This capacity also adds to the longevity of the product, ensuring it’s ready when you need it.4. **Compact and Portable:**- Despite its high power, the **AstroAI S8 Pro** is designed to be compact and portable. It fits comfortably in most car trunks or storage compartments, and its carrying case makes it easy to transport. It’s an ideal backup tool for emergencies without taking up too much space.5. **Advanced Safety Features:**- The jumper cables are equipped with **smart clamps** that feature multiple layers of safety protection, including **reverse polarity protection**, **overcurrent protection**, **overvoltage protection**, and **short-circuit protection**. These features help ensure safe and worry-free use when jump-starting a vehicle.6. **Easy-to-Use Design:**- The interface is simple and easy to understand. There’s a clear **LED display** that indicates the charge level of the jump starter, and the included **jumper cables** are easy to connect. The included instructions are straightforward, so you don’t need to be a car expert to use it.7. **Durable and Weather-Resistant:**- The unit is built to withstand harsh conditions, with a durable casing that’s **impact-resistant** and **weather-resistant**, making it suitable for outdoor use. Whether you’re on the road in the rain or need it in a rough environment, it’s designed to keep working in tough situations.### **Pros:**- **High Power Output (3000A Peak):** Suitable for a wide range of vehicles, including large trucks and diesel engines.- **Portable & Compact:** Easy to store and carry around without taking up too much space.- **Versatile with Multiple Functions:** Can be used as a jump starter, a power bank, and an emergency flashlight, making it a multifunctional tool.- **Advanced Safety Features:** Ensures safe and worry-free jump-starting with reverse polarity and other safety protections.- **Built-in Flashlight with Multiple Modes:** Handy for emergencies, whether you're dealing with a dead battery in the dark or need a signal light.- **Easy-to-Use Design:** Simple operation, clear display, and intuitive controls.### **Cons:**- **Not Ideal for Extremely Large Engines:** Although the S8 Pro can handle up to 9.0L gas and 7.0L diesel engines, it may not be sufficient for very large industrial or commercial engines (e.g., some heavy-duty trucks).- **USB Ports are Limited for Charging Multiple Devices Simultaneously:** While it can charge devices, the two USB ports may not be able to power multiple devices at the same time as efficiently as dedicated power banks.### **Conclusion:**The **AstroAI S8 Pro Car Battery Jump Starter** is a powerful, multifunctional tool designed for individuals who need reliable power for jump-starting a variety of vehicles, from small cars to large trucks and diesel engines. Its **3000A peak output** and **multi-use functions** (including power bank and flashlight) make it a great companion for emergency preparedness, travel, or outdoor adventures. The advanced **safety features** add peace of mind, ensuring safe and easy use in any situation. While it might be a bit heavy for some users and is not suitable for extremely large engines, it offers great value for anyone in need of a high-capacity, portable jump starter with additional features.

I would give this 6-Stars if I could. This AstroAI S8 Pro Car Battery Jump Starter is amazing. I have a 1972 Chevy K10 with a 350. It had not been started for 4-months and the battery was dead. Normally when it has not been started for a while you really have to turn it over while pumping the gas. It took a couple of tries to get the truck running. After it started, the AstroAI still had 75% of its battery left. Fabulous! I seriously had my doubts that this jumper would get the truck going. No problem at all and the jumper still had lots of available battery left after.This battery jump starter features four built-in 3.7V lithium batteries in a series connection. The battery pack capacity is 3000mAh (14.8V), equivalent to 12000mHa (3.7V). The Jump Start Current is 500A. Advertised as being perfect for up to 9L gas or 6L diesel engines. As easy as this jumper turned over my cold 350, I fully believe it is capable of this claim.The AstroAI S8 Pro also has 2 USB-A ports each outputting 5V-2.4A. So this can also be used as a high power power bank to charge any USB devices. There is also a flashlight which has 3-modes: Flashlight, Strobe, and SOS. The jump starter is charged using USB-C 5V-3A. It charges super fast and does not even get warm when charging. The jumper has a little heft to given its size which tells me that quality batteries are contained inside the jumper.At the time of this review, the AstroAI S8 Pro Car Battery Jump Starter was selling for $59.99 which is the lowest price ever at 25% off. This is worth every cent of the asking price. I am so impressed with how well it performed starting a Chevy 350 small block that had not been started for 4-months. I will be getting one of these for every vehicle. Seriously worth 6-Stars since it totally exceeded my expectations.

This battery jumper doesn't have any unneeded frills. It jumps your battery if it's dead and it comes in a small and light package that's easy to store in your vehicle or transport to another one. There are a couple of useful features that separate this from other jumpers.First, they call the cables that attach to the battery terminals "smart battery clamps." They are called smart for a couple reasons.First, it warns you if you hookup them up to the wrong terminals and have the polarity reversed. (In other words, you connected the positive clamp from the jumper to the negative battery terminal and the negative clamp from the jumper to the positive battery terminal.) If that's the case, a red light will illuminate showing that the clamps are attached to the wrong terminals.Second, if the light is solid green when the clamps are attached to the battery, you're good to start your vehicle. If the light flashes green, you need to press the "BOOST" button and wait until the light turns solid green, then try to start the car. This is necessary when the battery voltage is below 9V. If no light illuminates, it signals that you either didn't attach it securely enough to the battery terminals for a good connection, or possibly the battery could be damaged.Initially I didn't see the BOOST button function in the instructions, but I emailed the manufacturer and they promptly responded how the button functions and where to find it in the manual.This comes with a charging cable (USB-A to USB-C) but no charging block. I checked how many watts it pulls from the block, and it only needs about 15 watts to charge at full speed. Nearly all modern charging blocks can handle that amount.It has a flashlight that can be activated by a long press on the power button. It has a solid light initially, then another press activates a strobe light, another press initiates an SOS lighting pattern, and pressing it again shuts off the light.Last thing to note is that you can also use it to charge other USB devices, such as your phone or tablet or portable tire inflator. In my case, I don't think that I'll use it, even though it's nice to have in an emergency.This should have enough power for any typical car or SUV. If you have a very heavy duty commercial vehicle, it might be worth searching out a more powerful jumper.

Not as described 500a it says on the box