The KeenPower SC6000 Pro Supercapacitor is the better jump starter overall, rated 3.5 to 2.6. The KeenPower SC6000 Pro Supercapacitor leads on features and value. The KeenPower SC6000 Pro Supercapacitor costs $38.27 less ($299 vs $337.27).
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 $299.99 KeenPower $299For truck shops, fleets and farms that need to start 24 V diesel equipment as well as 12 V vehicles. Anyone with only 12 V vehicles should buy a lighter, cheaper booster.
Amazon $337.27Prices 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.
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 | Schumacher DSR166 |
|---|---|---|
| Overall rating | 3.5/5 | 2.6/5 |
| Value 40% | 43 $299 for its size | 32 $337.27 for its size |
| Features 35% | 80 manual override, rated to -45 °F | 35 basic |
| Capacity 15% | 50 capacity not published in Wh (neutral score used) | 50 capacity not published in Wh (neutral score used) |
| Warranty 10% | 50 warranty not published (neutral score used) | 0 1-year warranty |
| KeenPower SC6000 Pro Supercapacitor | Schumacher DSR166 | |
|---|---|---|
| Starting | ||
| Rated engines | all gas | Cars, trucks, SUVs and 24 V semi-trucks (no liter rating) |
| Peak amps (maker) | 6,000 A | 4,400 A |
| Cranking amps | - | 750 A |
| Cold cranking amps | - | 525 A |
| Voltage | 12 V | 12/24 V |
| Manual override | Yes | - |
| Lowest operating temperature | -45 °F | - |
| Battery and charging | ||
| Chemistry | Supercapacitor | Lead-acid (AGM) |
| Recharge time | - | 48 hours |
| USB outputs | - | USB-A 2.1 A, 12 V DC outlet |
| Build | ||
| Flashlight | - | No |
| Air compressor | No | No |
| Weight | 11.5 lb | 41.2 lb |
| Warranty | - | 1 year |
| Released | 2024-04 | 2024-06 |
