The Stanley LJ20F is the better jump starter overall, rated 3.2 to 3.1. The Stanley LJ20F costs $6.09 less ($116.41 vs $122.50).
For drivers who want a lithium pack that recharges over USB-C and comes with both wall and car chargers. Those who need to revive a fully dead battery should pick a model with an override mode.
Amazon $116.41For campers and tailgaters who want one box that jumps a truck, pumps tires and runs small AC gear. Drivers who only need a jump should buy a lighter lithium pack.
Amazon $122.50Prices were last checked November 2, 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 trucks and v8s jump starter; a clear win is highlighted. How we rank explains each one.
| Factor weight | Stanley LJ20F | Schumacher SJ1332 |
|---|---|---|
| Overall rating | 3.2/5 | 3.1/5 |
| Value 40% | 70 $116.41 for its size | 67 $122.50 for its size |
| Features 35% | 40 rated to -4 °F, USB-C charging; no override for a flat battery | 35 basic |
| Capacity 15% | 50 capacity not published in Wh (neutral score used) | 50 capacity not published in Wh (neutral score used) |
| Warranty 10% | 0 1-year warranty | 0 1-year warranty |
| Stanley LJ20F | Schumacher SJ1332 | |
|---|---|---|
| Starting | ||
| Rated engines | Cars and trucks up to V8 (no liter rating) | 8 L gas, 6 L diesel |
| Peak amps (maker) | 2,000 A | 1,200 A |
| Cranking amps | - | 370 A |
| Voltage | 12 V | 12 V |
| Manual override | No | - |
| Lowest operating temperature | -4 °F | - |
| Battery and charging | ||
| Chemistry | Lithium-ion | Lead-acid (AGM) |
| USB-C input | 30 W | - |
| Recharge time | - | 15 hours |
| USB outputs | USB-C PD 30 W, USB-A 15 W | USB-A 2 A, two 12 V DC outlets, two 120 V AC outlets (200 W) |
| Build | ||
| Flashlight | Yes | Yes |
| Air compressor | No | Yes |
| Dimensions | - | 12 x 11.6 x 11.35 in |
| Weight | - | 18 lb |
| Warranty | 1 year | 1 year |
| Released | 2026-05 | - |
