The AstroAI S8 is a portable jump starter engineered to revive the batteries of various vehicles, including cars, motorcycles, trucks, and boats. Despite its small size, this jump starter packs an impressive punch in terms of power. Also equipped with a high-capacity battery and advanced safety features, it’s an indispensable addition to your vehicle’s emergency toolkit.
AstroAI S8 features
- HIGH-PERFORMANCE JUMP STARTING. This jump starter’s powerful 1500 A peak current quickly starts low-voltage and fully-drained batteries. Besides, this jump starter has a 45 C high-rate lithium battery that can start 6.0 L gas/3.0 L diesel engines and other 12 V vehicles like motorcycles, cars, SUVs, pickups, or lawnmowers.
- ULTRA POWERFUL BOOST. The smart boost mode automatically detects the battery’s voltage. When the voltage is less than 9 V, the indicator flashes green; this unlocks the “BOOST” button, which can be pressed to start fully-drained batteries.
- ORIGINAL CHARGER FOR IMPROVED PROTECTION. The included original 10 W wall charger better protects the S8 Car Battery Jump Starter from excessive heat damage, loose ports, battery bulging, battery expansion, and more.
- COMPREHENSIVE SAFETY. This portable lithium car jump starter has 8 integrated protections including reverse polarity, reverse connection, overcurrent, overvoltage, overload, overcharge, over discharge, and short circuit protection. So, ensure your trip is safe and smooth.
- PORTABLE & COMPACT. With an overall size of 7.9*4.5*3.7″ and a item weight of 0.95 lbs, it is very easy to store in a car or a travel bag. Furthermore, compared with bulky lead-acid jump starters, this compact jump starter brings more convenience and peace in to your trip.
- 5-IN-1 MULTIFUNCTION. This device functions as a jump starter, portable power bank, and an LED flashlight with 3 modes (flashlight, strobe, SOS). The AstroAI Lithium Battery Jump Starter is your reliable, all-around trip companion here to gear you up for every adventure.
AstroAI S8 Advantages & Disadvantages
| Advantages | Disadvantages |
|---|---|
| ✔️ Versatile: The AstroAI S8 is compatible with various vehicle types, making it a versatile solution for different scenarios. | ✖️ Limited Battery Life: Like all jump starters, the AstroAI S8 has a limited number of jump starts on a single charge, so regular recharging is essential. |
| ✔️ Portable Powerhouse: Its compact size means it can be easily stored in your glove compartment or trunk without taking up much space. | ✖️ Price: While it offers excellent value for its features, some users may find it relatively expensive compared to basic jump starters. |
| ✔️ Safety: With its safety features, you can use it with confidence, knowing that it minimizes the risk of accidents during jump-starting. |
How to use this jump starter
Using the AstroAI S8 jump starter is a straightforward process:
- Connect the Clamps: Attach the red clamp to the positive terminal and the black to the negative terminal of your vehicle’s battery.
- Power On: Press the power button on the AstroAI S8 to activate it.
- Start Your Vehicle: Turn the ignition key, and then, the jump starter will supply the necessary power to start it.
AstroAI S8 Comparison models
 | |  |  | |
| Model | 118 | S8 | MF139 | MF159 |
| Amps | 2000 Amps | 1500 Amps | 1750 Amps | 2500 Amps |
| Gas Engines | Up to 7.0 Liters | Up to 6.0 Liters | Up to 7.5 Liters | Up to 7.5 Liters |
| Diesel Engines | Up to 3.0 Liters | Up to 3.0 Liters | Up to 5.0 Liters | Up to 5.0 Liters |
| Battery | Lithium Ion | Lithium Ion | Lithium Ion | Lithium Ion |
| Voltage | 12V | 12V | 12V | 12V |
| Weight | 1.3 pounds | 0.95 pounds | 1.9 pounds | 2.43 pounds |
| Air Compressor | No | No | 150PSI | 150PSI |
| Air Pump | No | No | No | 220 L/Min |
 | | | |
How to Maintain Your AstroAI S8
If you own a portable jump starter or are considering getting one, it’s crucial to understand how to keep it in top-notch condition
- Regular Inspection for Optimal Performance of Your S8 Astroai Car Battery Jumper
- Proper charging is crucial to maintain the functionality of your Astroai S8 car battery jumper.
- Storage. Proper storage is equally important, especially if you don’t use your S8 frequently.
- Regularly testing your jump starter ensures that it’s in working condition when you need it.
- Whenever possible, store your AstroAI S8 portable jump starter in a moderate temperature environment between 50 ºF – 70 ºF. Like vehicle batteries, exposure to extreme temperatures is detrimental to jump starter batteries, both in the short term and long term.
- Respect the cycles. Every jump starter is subject to a duty cycle in which the vehicle can be cranked only so long before a period of rest is needed. For almost all jump starters, the recommended duty cycle is between 5-6 seconds of cracking followed by 3-5 minutes of rest.
- Clean clamps. A battery in poor condition may have battery acid on the posts, so wiping down the clamps after jump starting a vehicle always is a good practice to keep the clamps from becoming corroded
If you want more information about how to maintain your car battery jumper click here.
User Reviews
Virginia P. – ★★★★★ (5/5)
Amazingly small!
Haven’t had to use it yet- just got it. It charged up really fast and the charge is supposed to last about 3 months. We’ll see. Amazing that such a small charger can acually start a vehicle. I was helped by a passerby when my battery went dead and he had one rather similar. My car started bight up! No one shoud be without one of these.
Greg Wilder – ★★★★☆ (4/5)
Well made
Was looking for a jump charger and had one picked out when I saw this one. I had already bought a car air pump (czx-3666) made by the same company (AstroA1). I use it 3 times a week for our bicycles and like how well made and reliable it is been. This product works well for all the features but haven’t needed to jump my cars. Maybe a little larger than some with plugin cables but packs neatly in a bag
Ferni – ★★★★★ (5/5)
I am truly impressed!
I was skeptical about this product as I owned a bigger 15-20pound jump starter/power pack in which I had to wait 5 minutes before trying to start a dead battery…. And that sometimes did not start the car.
However, with this little unit I just powered on, plugged in cables, attached to car battery, press “booster” button…. And then I started the vehicle (Honda CRV) right up. No waiting!
I am going to buy another to store in our other vehicle.