NOCO Boost GB20
#7 in Cars and SUVsFull review
For motorcycles, ATVs, lawn tractors and small four-cylinder cars where a compact, cheap pack is enough. Anything with a V6 or bigger needs a GB40 or larger.
Amazon $79.95$79.95
The NOCO Boost GB20 is the better jump starter overall, rated 3.4 to 3.3. The NOCO Boost GB20 leads on value. The NOCO Boost Plus GB40 wins on features. The NOCO Boost GB20 costs $20 less ($79.95 vs $99.95).
NOCO Boost Plus GB40
#9 in Cars and SUVsFull review
For drivers of four- and six-cylinder cars who want a proven, compact pack to keep in the car. Owners of bigger engines should step up to a GBX55 or larger.
Amazon $99.95$99.95
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 NOCO Boost GB20 for value ($79.95 for its size vs $99.95 for its size).
- Choose the NOCO Boost Plus GB40 for features (manual override, rated to -22 °F, USB-C charging, IP65 vs manual override, rated to -4 °F, USB-C charging, IP65).
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 | NOCO Boost GB20 | NOCO Boost Plus GB40 |
|---|---|---|
| Overall rating | 3.4/5 | 3.3/5 |
| Value 40% | 64 $79.95 for its size | 45 $99.95 for its size |
| Features 35% | 77 manual override, rated to -4 °F, USB-C charging, IP65 | 87 manual override, rated to -22 °F, USB-C charging, IP65 |
| Capacity 15% | 10 24 Wh battery | 10 24 Wh battery |
| Warranty 10% | 0 1-year warranty | 0 1-year warranty |
Independent measurements
NOCO Boost GB20
No independent test published yet.
NOCO Boost Plus GB40
| Tested by | Cranking | Peak | Conditions |
|---|---|---|---|
| MJLorton | 216 A | 225 A | Carbon pile load test (FJC 45118 1000 A tester), four back-to-back runs starting at 12.2 V down to 11.0 V. Highest current observed was 225 A; highest at about 7 V was 216 A (runs ranged 160 to 216 A at about 7 V). The same unit completed 16 real car starts. |
Specifications
| NOCO Boost GB20 | NOCO Boost Plus GB40 | |
|---|---|---|
| Starting | ||
| Rated engines | 4 L gas | 6 L gas, 3 L diesel |
| Peak amps (maker) | 500 A | 1,000 A |
| Voltage | 12 V | 12 V |
| Manual override | Yes | Yes |
| Lowest operating temperature | -4 °F | -22 °F |
| Battery and charging | ||
| Chemistry | Lithium-ion | Lithium-ion |
| Capacity | 24 Wh | 24 Wh |
| USB-C input | 10.5 W | 10.5 W |
| Recharge time | 3 hours | 3 hours |
| USB outputs | USB 10.5 W | USB 10 W |
| Build | ||
| Flashlight | Yes | Yes |
| Air compressor | No | No |
| Water resistance | IP65 | IP65 |
| Dimensions | 7.72 x 3.16 x 1.71 in | 7.72 x 3.16 x 1.71 in |
| Weight | 2.1 lb | 2.5 lb |
| Warranty | 1 year | 1 year |
| Released | 2016-12 | 2015-12 |