NOCO Boost Plus GB40
#4 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
The NOCO Boost Plus GB40 is the better jump starter overall, rated 3.3 to 3.1. The NOCO Boost Plus GB40 leads on value. The NOCO Boost X GBX45 wins on capacity. The NOCO Boost Plus GB40 costs $25 less ($99.95 vs $124.95).
NOCO Boost X GBX45
#5 in Cars and SUVsFull review
For car and small-SUV owners who want a compact pack that refills fast from any USB-C charger. It costs a little more than the GB40 but recharges several times faster.
Amazon $124.95$124.95
Prices 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.
Which should you buy?
- Choose the NOCO Boost Plus GB40 for value ($99.95 for its size vs $124.95 for its size).
- Choose the NOCO Boost X GBX45 for capacity (31 Wh battery vs 24 Wh battery).
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 Plus GB40 | NOCO Boost X GBX45 |
|---|---|---|
| Overall rating | 3.3/5 | 3.1/5 |
| Value 40% | 45 $99.95 for its size | 23 $124.95 for its size |
| Features 35% | 87 manual override, rated to -22 °F, USB-C charging, IP65 | 90 manual override, rated to -4 °F, USB-C charging, IP65 |
| Capacity 15% | 10 24 Wh battery | 28 31 Wh battery |
| Warranty 10% | 0 1-year warranty | 0 1-year warranty |
Specifications
| NOCO Boost Plus GB40 | NOCO Boost X GBX45 | |
|---|---|---|
| Starting | ||
| Rated engines | 6 L gas, 3 L diesel | 6.5 L gas, 4 L diesel |
| Peak amps (maker) | 1,000 A | 1,250 A |
| Voltage | 12 V | 12 V |
| Manual override | Yes | Yes |
| Lowest operating temperature | -22 °F | -4 °F |
| Battery and charging | ||
| Chemistry | Lithium-ion | Lithium-ion |
| Capacity | 24 Wh | 31 Wh |
| USB-C input | 10.5 W | 60 W |
| Recharge time | 3 hours | 0.8 hours |
| USB outputs | USB 10 W | USB-C 60 W, USB-A 10 W |
| Build | ||
| Flashlight | Yes | Yes |
| Air compressor | No | No |
| Water resistance | IP65 | IP65 |
| Dimensions | 7.72 x 3.16 x 1.71 in | 6.83 x 3.28 x 2.08 in |
| Weight | 2.5 lb | 2.2 lb |
| Warranty | 1 year | 1 year |
| Released | 2015-12 | 2021-11 |