The KeenPower SC6000 Pro Supercapacitor and the Clore Jump-N-Carry JNC345 are evenly matched, rated 3.9 and 3.9. The Clore Jump-N-Carry JNC345 costs $7.11 less ($192.88 vs $199.99).
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 shops, fleets and owners of large gas or diesel trucks who need a light pack with real reach and cold-weather rating. It covers bigger engines than most lithium packs at its price.
Amazon $192.88Prices were last checked October 31, 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 | Clore Jump-N-Carry JNC345 |
|---|---|---|
| Overall rating | 3.9/5 | 3.9/5 |
| Value 40% | 71 $199.99 for its size | 73 $192.88 for its size |
| Features 35% | 80 manual override, rated to -45 °F | 82 manual override, rated to -22 °F, USB-C charging |
| Capacity 15% | 50 capacity not published in Wh (neutral score used) | 61 89 Wh battery |
| Warranty 10% | 50 warranty not published (neutral score used) | 0 1-year warranty |
| KeenPower SC6000 Pro Supercapacitor | Clore Jump-N-Carry JNC345 | |
|---|---|---|
| Starting | ||
| Rated engines | all gas | 10 L gas, 10 L diesel |
| Peak amps (maker) | 6,000 A | 3,000 A |
| Voltage | 12 V | 12 V |
| Manual override | Yes | Yes |
| Lowest operating temperature | -45 °F | -22 °F |
| Battery and charging | ||
| Chemistry | Supercapacitor | Lithium-ion |
| Capacity | - | 89 Wh |
| USB-C input | - | 18 W |
| USB outputs | - | 2 x USB-A, 12 V 10 A outlet |
| Build | ||
| Flashlight | - | Yes |
| Air compressor | No | No |
| Weight | 11.5 lb | 4.4 lb |
| Warranty | - | 1 year |
| Released | 2024-04 | 2020-09 |
