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 3.5. The AstroAI S8 leads on value and warranty. The Clore Jump-N-Carry JNC305 wins on capacity. The AstroAI S8 costs $30.05 less ($42.19 vs $72.24).
Clore Jump-N-Carry JNC305
#5 in Cars and SUVsFull review
For drivers of four- and six-cylinder cars who want a cheap, sturdy pack from a pro tool brand. Those in very cold places should pick a pack rated below 0 °F.
Amazon $72.24$72.24
Prices were last checked October 30, 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 $72.24 for its size) and warranty (2-year warranty vs 1-year warranty).
- Choose the Clore Jump-N-Carry JNC305 for capacity (37 Wh battery vs 29.6 Wh battery).
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 | Clore Jump-N-Carry JNC305 |
|---|---|---|
| Overall rating | 4.0/5 | 3.5/5 |
| Value 40% | 98 $42.19 for its size | 71 $72.24 for its size |
| Features 35% | 67 manual override, rated to -4 °F, USB-C charging | 64 manual override, rated to 0 °F, USB-C charging |
| Capacity 15% | 24 29.6 Wh battery | 42 37 Wh battery |
| Warranty 10% | 50 2-year warranty | 0 1-year warranty |
Specifications
| AstroAI S8 | Clore Jump-N-Carry JNC305 | |
|---|---|---|
| Starting | ||
| Rated engines | 6 L gas, 3 L diesel | 6 L gas, 3 L diesel |
| Peak amps (maker) | 1,500 A | 1,000 A |
| Voltage | 12 V | 12 V |
| Manual override | Yes | Yes |
| Lowest operating temperature | -4 °F | 0 °F |
| Battery and charging | ||
| Chemistry | Lithium-ion | Lithium-ion |
| Capacity | 29.6 Wh | 37 Wh |
| USB-C input | 10 W | 10 W |
| USB outputs | USB-A 5 V/2.1 A | USB-A 12 W |
| Build | ||
| Flashlight | Yes | Yes |
| Air compressor | No | No |
| Dimensions | 7.9 x 4.5 x 3.7 in | - |
| Weight | 0.9 lb | 2.2 lb |
| Warranty | 2 years | 1 year |
| Released | 2025-03 | 2024-08 |