AstroAI S8 Air
#2 in Cars and SUVsFull review
A combined jump starter and tire inflator for small and mid-size cars. Good for drivers who want one compact roadside kit, not for trucks.
Amazon $59.99$59.99
4.0/5
A tiny, cheap starter for four- and six-cylinder cars. Fine as a glovebox backup, but not for trucks or V8s.
- 6 L gas, 3 L dieselEngines
- 29.6 WhBattery
- YesOverride
- 0.9 lbWeight
- 2 yearsWarranty
Check price at Amazon$42.19
Price checked October 22, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Under 1 lb, small enough for a glovebox
- Boost mode jumps a fully flat battery
- Two-year warranty
- Works down to -4 °F
Cons
- Rated only for gas engines up to 6 L
- Small battery; slow 10 W USB-C recharge
- Only one USB-A port for phones
How it scores
The rating comes from 4 measured or published factors, each scored 0-100 against fixed reference points for its engine size. How we rank explains each one.
Specifications
| Model number | S8 |
|---|---|
| Starting | |
| Rated engines | 6 L gas, 3 L diesel |
| Peak amps (maker) | 1,500 A |
| Voltage | 12 V |
| Manual override | Yes |
| Lowest operating temperature | -4 °F |
| Battery and charging | |
| Chemistry | Lithium-ion |
| Capacity | 29.6 Wh |
| USB-C input | 10 W |
| USB outputs | USB-A 5 V/2.1 A |
| Build | |
| Flashlight | Yes |
| Air compressor | No |
| Dimensions | 7.9 x 4.5 x 3.7 in |
| Weight | 0.9 lb |
| Warranty | 2 years |
Alternatives in this engine size
Fanttik Potent T10
#3 in Cars and SUVsFull review
A stylish, very compact pack for cars and small SUVs up to 7 liters that doubles as a phone charger. Pick it for portability, not for big trucks or deep cold.
Amazon $89.99$89.99
NOCO Boost Plus GB40
#4 in Cars and SUVsFull review
For drivers of four- and six-cylinder cars who want a proven, compact pack to keep in the car. Owners of bigger engines should step up to a GBX55 or larger.
Amazon $99.95$99.95
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