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
3.1/5
For car and small-SUV owners who want a compact pack that refills fast from any USB-C charger. It costs a little more than the GB40 but recharges several times faster.
- 6.5 L gas, 4 L dieselEngines
- 31 WhBattery
- YesOverride
- 2.2 lbWeight
- 1 yearWarranty
Check price at Amazon$124.95
Price checked October 22, 2026. As an Amazon Associate we earn from qualifying purchases.
Pros
- Recharges from empty in under an hour on a laptop USB-C charger
- Can force a jump on a completely dead battery with manual override
- Charges a laptop or phone at up to 60 W
- Light and compact at about 2 lb
Cons
- Rated only to 6.5 L gas and 4.0 L diesel, so not for big V8s
- Small 31 Wh battery: up to 6 jumps per charge
- One-year warranty is short
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 | GBX45 |
|---|---|
| Starting | |
| Rated engines | 6.5 L gas, 4 L diesel |
| Peak amps (maker) | 1,250 A |
| Voltage | 12 V |
| Manual override | Yes |
| Lowest operating temperature | -4 °F |
| Battery and charging | |
| Chemistry | Lithium-ion |
| Capacity | 31 Wh |
| USB-C input | 60 W |
| Recharge time | 0.8 hours |
| USB outputs | USB-C 60 W, USB-A 10 W |
| Build | |
| Flashlight | Yes |
| Air compressor | No |
| Water resistance | IP65 |
| Dimensions | 6.83 x 3.28 x 2.08 in |
| Weight | 2.2 lb |
| Warranty | 1 year |
| Released | 2021-11 |
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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