The KeenPower SC6000 Pro Supercapacitor is the better jump starter overall, rated 3.9 to 3.7. The KeenPower SC6000 Pro Supercapacitor leads on value. The KeenPower SC6000 Pro Supercapacitor costs $50 less ($199.99 vs $249.99).
For drivers in very cold places, or who leave a jump starter in the car for years and forget to charge it. Most people get more for their money from a lithium pack.
Amazon $199.99For owners of big gas trucks and diesel pickups who want a compact pack that recharges fast over USB-C. Cheaper packs cover smaller engines just as well.
Amazon $249.99Prices 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.
Each factor is scored 0-100 against the same fixed reference points for every heavy duty jump starter; a clear win is highlighted. How we rank explains each one.
| Factor weight | KeenPower SC6000 Pro Supercapacitor | Antigravity XP-20-HD Micro-Start |
|---|---|---|
| Overall rating | 3.9/5 | 3.7/5 |
| Value 40% | 71 $199.99 for its size | 57 $249.99 for its size |
| Features 35% | 80 manual override, rated to -45 °F | 80 manual override, rated to -4 °F, USB-C charging |
| Capacity 15% | 50 capacity not published in Wh (neutral score used) | 61 88.8 Wh battery |
| Warranty 10% | 50 warranty not published (neutral score used) | 25 1.5-year warranty |
| KeenPower SC6000 Pro Supercapacitor | Antigravity XP-20-HD Micro-Start | |
|---|---|---|
| Starting | ||
| Rated engines | all gas | 10 L gas, 8 L diesel |
| Peak amps (maker) | 6,000 A | 4,650 A |
| Cranking amps | - | 930 A |
| Voltage | 12 V | 12 V |
| Manual override | Yes | Yes |
| Lowest operating temperature | -45 °F | -4 °F |
| Battery and charging | ||
| Chemistry | Supercapacitor | Lithium-ion |
| Capacity | - | 88.8 Wh |
| Capacity (mAh) | - | 24,000 mAh |
| USB-C input | - | 100 W |
| Recharge time | - | 1 hours |
| USB outputs | - | USB-C 100 W, USB-A QC3.0 18 W, USB-A 12 W |
| Build | ||
| Flashlight | - | Yes |
| Air compressor | No | No |
| Dimensions | - | 9.4 x 4 x 1.9 in |
| Weight | 11.5 lb | 2.1 lb |
| Warranty | - | 1.5 years |
