AstroAI S8
#1 in Cars and SUVsFull review
A tiny, cheap starter for four- and six-cylinder cars. Fine as a glovebox backup, but not for trucks or V8s.
Amazon $42.19$42.19
The AstroAI S8 is the better jump starter overall, rated 4.0 to 3.1. The AstroAI S8 leads on value and warranty. The NOCO Boost X GBX45 wins on features. The AstroAI S8 costs $82.76 less ($42.19 vs $124.95).
NOCO Boost X GBX45
#5 in Cars and SUVsFull review
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.
Amazon $124.95$124.95
Prices were last checked October 22, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the AstroAI S8 for value ($42.19 for its size vs $124.95 for its size) and warranty (2-year warranty vs 1-year warranty).
- Choose the NOCO Boost X GBX45 for features (manual override, rated to -4 °F, USB-C charging, IP65 vs manual override, rated to -4 °F, USB-C charging).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every cars and suvs jump starter; a clear win is highlighted. How we rank explains each one.
| Factor weight | AstroAI S8 | NOCO Boost X GBX45 |
|---|---|---|
| Overall rating | 4.0/5 | 3.1/5 |
| Value 40% | 98 $42.19 for its size | 23 $124.95 for its size |
| Features 35% | 67 manual override, rated to -4 °F, USB-C charging | 90 manual override, rated to -4 °F, USB-C charging, IP65 |
| Capacity 15% | 24 29.6 Wh battery | 28 31 Wh battery |
| Warranty 10% | 50 2-year warranty | 0 1-year warranty |
Specifications
| AstroAI S8 | NOCO Boost X GBX45 | |
|---|---|---|
| Starting | ||
| Rated engines | 6 L gas, 3 L diesel | 6.5 L gas, 4 L diesel |
| Peak amps (maker) | 1,500 A | 1,250 A |
| Voltage | 12 V | 12 V |
| Manual override | Yes | Yes |
| Lowest operating temperature | -4 °F | -4 °F |
| Battery and charging | ||
| Chemistry | Lithium-ion | Lithium-ion |
| Capacity | 29.6 Wh | 31 Wh |
| USB-C input | 10 W | 60 W |
| Recharge time | - | 0.8 hours |
| USB outputs | USB-A 5 V/2.1 A | USB-C 60 W, USB-A 10 W |
| Build | ||
| Flashlight | Yes | Yes |
| Air compressor | No | No |
| Water resistance | - | IP65 |
| Dimensions | 7.9 x 4.5 x 3.7 in | 6.83 x 3.28 x 2.08 in |
| Weight | 0.9 lb | 2.2 lb |
| Warranty | 2 years | 1 year |
| Released | - | 2021-11 |