NOCO Boost Plus GB40 vs GB50

Both the NOCO Boost Plus GB40 and the Noco Boost GB50 are powerful jumpstarters, that are multi-functional and offer great alternative to traditional car battery jump starters that you can not carry everywhere. Both NOCO Boost devices are reliable jump starters to restart dead batteries of gas or diesel engines. Features like reverse polarity protection and spark-proof technology make these starters safe to use personally without help from any electro-mechanical expert.

Noco GB40 is suitable for small 3L diesel cars or 6L vehicles running on gas as its Lithium-ion battery specifies 24 watt-hour energy to power up the empty batteries. Its powerful current discharge quickly restarts the vehicle as it transmits charge to dead batteries, moreover, its ultra-safe technology prevents spark triggering.

NOCO Boost Plus GB40 vs XL GB50

Noco Boost GB50 stimulates the dead battery cells with a high peak current as it is equipped with a high energy 35 watt-hour internal battery. It transfers charge via its HD precision clamps ensuring a quick jump start. Moreover, its reverse polarity protection feature safeguards against short circuits and sparking in case of a wrong connection.

As compared to Noco GB40, XL GB50 shows high power internal battery, a greater peak current rating, more jump starts per charge, and a bright LED flashlight but it is priced relatively higher and takes more time to recharge.

NOCO Boost Plus GB40 vs GB50 Pros and Cons


Pros of Noco Boost GB40Pros of Noco Boost GB50
Inexpensive than its competitor.Suitable for relatively high powered engines
A safe jump starter with spark-proof technology and reverse polarity protectionProvides more jumpstarts per charge
Faster rechargeHigh powered internal battery
Jump starts both gas and diesel enginesHigher Peak current rating

Powerful 200 lumens LED flashlight


Cons of Noco Boost GB40Cons of Noco Boost GB50
Lower peak current ratingPriced higher
Lesser number of jump starts per chargeTakes more time to recharge
Low powered internal batteryMicrofiber storage bag instead of hard casing
Suitable for relatively low capacity engines
Low powered light


These devices offer a reliable backup for dead vehicles batteries and mobile devices for a long duration.

NOCO provides a limited warranty of 1 year for both of these jump starters, ensuring replacement if the device has a material or craftsmanship fault.

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SpecificationsNoco GB40GB50
ManufacturerNOCO BoostNOCO Boost
Internal Battery24 Watt-hour Lithium-Ion35 Watt-hour Lithium-Ion
Peak Current Rating1000 A1500 A
Number of boosters per charge2030
Micro USB Input5 V, 2.1 A5 V, 2.1 A
USB Output5 V, 2.1 A5 V, 2.1 A
12 V Input/ Output portsNoNo
Safety featureYesYes
Manual OverdriveYesYes
LED Flashlight100 Lumens200 Lumens
Housing ProtectionIP65 (w/ Ports closed)IP65 (w/ Ports closed)
Cooling systemNatural convectionNatural convection
Unit weight1.65 lbs.
1.65 lbs.
Unit weight with clamps & accessories2.4 lbs.2.71 lbs.
CertificationsFCC, RoHSFCC, RoHS
Warranty1 year1 year
Price (US dollars)85 to 150 $120 to 170 $


Noco Gb40 gives a characteristic rugged battery-look as its casing is Black and Grey colored, showing LED buttons, pointers, and battery level indicator. It has small LEDs indicating power, error, and boost functions as well as power, manual override, and light mode buttons along with a charging level indicator. USB input and output ports are located on its side to recharge the jump starter or power up mobile devices through it. It also contains an LED flashlight which comes in handy especially at night or in cloudy weather. GB40 shows compact dimensions in comparison to a unit weight of 1.65 lbs, so it can be stored easily in the car.

Noco Boost GB50 has the identical Grey-Black layout and same battery elements as that of its contestant however, it takes a little more space as its size is a few millimeters larger. Furthermore, it is equipped with a 200 Lumens LED, providing a better lighting facility.

Physical CharacteristicsGB40GB50
ColorBlack and GreyBlack and Grey
Weight (lbs.)1.651.65
Height (inches)1.71.9
Width (inches)3.23.4
Length (inches)7.78.6


NOCO jump starters are rechargeable via a USB powered port like a car charger, laptop, or AC adapter. Charging time depends on the current level as well as the ampere value of the battery.

The higher the Ampere ratings of the USB charger, the sooner the battery would be charged, and the higher the peak current rating of the jump starter, the longer it will take to recharge to the full potential.

Hence, GB50 takes more time for recharging because it has to restore a higher charge level.

USB Charger RatingGB40GB50
0.5 A12 hrs.18 hrs.
1 A6 hrs.9 hrs.
2 A3hrs.4.5 hrs.

Peak Starting Current

These devices can be used to jump-start small and medium-sized engines due to their moderate Ampere values. Noco GB40 takes the lower position in competition because it has a peak current rating of up to 1000 A and can restore dead batteries 20 times on a single charge which makes it more suitable for smaller engines with low power requirements.

Noco Boost GB50 scores more for peak current level and can be used to power up dead batteries of larger engines as compared to its competitor. Its peak Ampere value is 1500 A and it can jump start single-battery applications up to 30 times in a single charge.

Manual Override

If the battery voltage drops to a very low level, a high charge influx is needed to restore it. In such conditions, jump starters automatically disable functioning due to safety concerns.

Both NOCO starters have an overriding function for 12V lead-acid batteries by disabling safety features and providing full current discharge to the dead battery. Press the manual override button to jump-start a battery with a voltage lesser than 12V. However, this feature should be used with caution because a high current influx can generate sparks.

Supported Vehicles Models

These devices can restore dead batteries of diesel and gas engines of cars, trucks, boats, or lawn moaners.

GB50 takes the lead in this respect as it can be used for powering up gas engines with 7 liters capacity and diesel engines with 4.5 liters capacity.

While GB40 specifies an ability to jumpstart smaller engines relatively as it can only reestablish batteries of 6 liters gas engines and 3 liters diesel engines.


Noco GB40 offers more economic benefit for vehicle owners with small engine cars as it provides a reliable power backup and costs lesser money to own than its competitor. Its expense ranges from 85 to 150 $.

GB50 ranks expensive in comparison but it also offers a larger peak current and the ability to restore heavy engines. It usually comes for 120 to 170 $.

How to Operate?

Both devices employ the same easy-to-perform procedure to jump-start a vehicle’s battery. The following steps are included in this method;

  1. Attach clamps to the designated socket on the jump starter.
  2. Attach clamps with respective terminals of the car’s battery.
  3. Turn off the power loads (highlights, AC, radio) of the car.
  4. Press the power button to jump-start, boost LED will indicate the correct connection.
  5. Wait 20-30 seconds and start the car.
  6. Remove the jump starter after the car starts.

NOCO Boost Plus GB40 vs GB50 Summary

  • Both jump starters can be used for gas and diesel engine batteries.
  • GB50 specifies a high-energy internal battery and supplies a higher peak current.
  • Both devices look and weigh the same but GB50 is a bit larger in size.
  • GB40 needs less time to recharge as compared with the competitor.
  • Manual overriding and reverse polarity protection features are present in both.
  • GB40 is suitable for low-capacity engines in comparison.
  • Both products have a limited warranty for 1 year.
  • GB50 costs higher than its competitor.