Battery Equivalents and Replacements

NOCO Genius Boost 12V UltraSafe Lithium Jump Starters

NOCO Genius Boost 12V UltraSafe Lithium Jump Starters is a group of several jump starters powered by lithium batteries. They are Noco Boost Sport GB20 400 Amps, Noco Boost Plus GB40 1000 Amps, Noco Boost HD GB70 2000 Amps and Noco Boost Pro GB150 4000 Amps.

While the smallest Sport GB20 is strong enough to start motors of smaller boats, yachts, cars, and similar, the largest Pro GB150 4000 Amp is capable of starting even the largest car, truck, boat, and yacht motors.

Nonetheless, be sure to get a jump starter according to your actual need or perhaps slightly stronger. 'Stronger jump starter' also means 'more expensive,' but this is the type of equipment that one should hopefully never use - after the first use, you will forget the initial costs.

Updated: February 8, 2024.

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NOCO Genius Boost 12V UltraSafe Lithium Jump Starters Features and Specifications

NOCO Genius Boost 12V UltraSafe Lithium Jump Starters can be used for starting internal combustion motors, but also for recharging personal devices (smartphones, tablets, laptops, etc), as LED flashlights with several modes of operation, etc.

Recharging other devices is a good thing, but don't discharge your jump starter fully - a discharged jump starter is useless for its intended role (when you need it the most!).

Also, they have many built-in safety features for safer operation - and these safety features are there for a very good reason since these devices produce large currents that can cause serious damage, injuries, or worse!

So, be very careful when using these devices. Being based on lithium batteries, after being fully charged, they can be stored for months (4-6) and still be able to do their job.

NOCO Genius Boost 12V UltraSafe Lithium Jump Starters differ in size, capacity, maximum current, and other important details. Their features and specifications are given in the following table:

Model NOCO Genius Boost Sport GB20 400 Amp NOCO Genius Boost Plus GB40 1000 Amp NOCO Genius Boost HD GB70 2000 Amp NOCO Genius Boost Pro GB150 4000 Amp
Photo noco gb20 1  noco gb40 1  noco gb70 1  noco gb150 1 
Maximum Peak Current 400 Amp 1000 Amp 2000 Amp 4000 Amp
Maximum Recommended Engine 4 liters gas; not recommended for diesel engines 6 liters gas; 3 liters diesel 8 liters gas; 6 liters diesel 10+ liters gas and diesel engines
LED Flashlight 100-lumen LED flashlight with 7 light modes, including SOS and Emergency Strobe  100-lumen LED flashlight with 7 light modes, including SOS and Emergency Strobe  400-lumen LED flashlight with 7 light modes, including SOS and Emergency Strobe 500-lumen LED flashlight with 7 light modes, including SOS and Emergency Strobe 
3 Seconds Energy (Joules) 4650 J 7000 J 15700 J 22500 J
Number of Jump Starts 20 20 40 80
Stored Energy 24 Wh 24 Wh 55 Wh 88 Wh
Apple Watch Recharges  25x 25x 46x 94x
Apple iPhone Recharges 2.9x 2.9x 5.3x 10x
Apple iPad Mini Recharges 1.0x 1.0x 1.9x 3.7x
USB Input 2.1 A 2.1 A 2.1 A 2.1 A
USB Output 2.1 A 2.1 A 2.1 A 2.1 A
XGC Input - - 12 VDC, 3 Amp Rapid Charge (3-Hour Recharge) 12 VDC, 5 Amp Rapid Charge (3-Hour Recharge)
XGC Output - - 12 VDC, 15 Amp Power Supply 12 VDC, 15 Amp Power Supply
Safety Features Spark-proof, Reverse Polarity Protection, Thermal Protection Spark-proof, Reverse Polarity Protection, Thermal Protection Spark-proof, Reverse Polarity Protection, Thermal Protection Spark-proof, Reverse Polarity Protection, Thermal Protection, Built-in Voltmeter
Operating Temperature -30°C to +50°C -30°C to +50°C -30°C to +50°C -30°C to +50°C
Charging Temperature 0°C to +40°C 0°C to +40°C 0°C to +40°C 0°C to +40°C
Recharging Time - USB Charger 0.5 A 12h 12h 28h 45h
Recharging Time - USB Charger 1 A 6h 6h 14h 22h
Recharging Time - USB Charger 2 A 3h 3h 7h 11h
Recharging Time - 12 V Fast Charge - - 3A @ 12V (36W) - 2-3h 5A @ 12V (60W) - 2-3h
Dimensions 7.7 x 3.2 x 1.7 inches
196 x 80.3 x 43.4 mm
7.7 x 3.2 x 1.7 inches
196 x 80.3 x 43.4 mm
8.8 x 6 x 2.8 inches
222 x 152 x 70 mm
12.4 x 7.3 x 2.7 inches
315 x 185 x 69 mm
Weight 2.1 lbs (0.95 kg) 2.4 lbs (1.08 kg) 5 lbs (2.26 kg) 7.5 lbs (3.39 kg)
What's in the Box GB20 Lithium Battery Jump Starter, Needle-Nosed Battery Clamps, Micro USB Cable, Microfiber Storage Bag, User Guide & Warranty Information GB40 Lithium Battery Jump Starter, Heavy-Duty Battery Clamps, 12V Car Charger, Micro USB Cable, Microfiber Storage Bag, User Guide & Warranty Information GB70 Lithium Battery Jump Starter, XGC 12V Male Adapter, XGC 12V Female Adapter, XGC Extension Cable, Micro USB Cable, Microfiber Storage Bag, User Guide & Warranty Information GB150 Lithium Battery Jump Starter, XGC 12V Male Adapter, XGC 12V Female Adapter, XGC Extension Cable, Micro USB Cable, Microfiber Storage Bag, User Guide & Warranty Information
Amazon Link NOCO Genius Boost Sport GB20 400 Amp NOCO Genius Boost Plus GB40 1000 A NOCO Genius Boost HD GB70 2000 Amp NOCO Genius Boost Pro GB150 4000 A

Note: all the links in the table are Amazon affiliate links, and they open in the new windows, so feel free to check them.

NOCO Genius Boost Sport GB20 400 Amp 12V UltraSafe Lithium Jump Starter

noco gb20 w400pxGB20 is the smallest model in this group. It is based on the 24 Wh lithium battery and is capable of providing 400 Amps of current. Three seconds of transferred energy is around 4650 J, and when fully charged, it is capable of around 20 jump starts. Of course, the number of jump starts depends on the type and size of the engine and how quickly it starts.

GB20 is recommended for gas engines up to 4 liters in displacement, and it is not recommended for diesel engines at all.

Personally, if you have a very small diesel motor (boat, generator, and similar), it can be started with this unit, too, but only in emergencies. When buying a jump starter, buy it according to the engines you have, and if you have diesel or diesels, go for one of the larger unit.

GB20 is rather small and lightweight and requires very little space for storage. It comes with a 100-lumen LED flashlight, which can be very helpful when jump-starting the engine during the night.

All NOCO Genius Boost jump starters require a battery to be present when jump-starting the engine.

If it is not present, the jump starter will not work. However, there is a manual override present, but it must be used with utmost caution since it disables the safety features of the unit.

All NOCO Genius Boost jump starters are designed for jump-starting engines with various lead-acid batteries (AGM, Gel Cel, Wet/Flooded, etc.), so if the vehicle/boat/application uses some other battery type, it is perhaps better to disconnect the battery.

Modern lithium batteries, designed to replace lead acid batteries directly, have protective circuitry and should not cause any issue, however, better safe than sorry. Anyway, check the documentation of the battery itself, and if doubt, disconnect it.

When using the GB20 or any other similar unit, carefully connect the unit, turn it on and wait some 25-30 seconds, and then try to jump-start the battery - if the battery is present, the jump starter will try to refresh the battery as much as possible. Be sure to let the unit 'rest' for at least 30 seconds after each use - this time is required for the unit to cool down.

Also, after 5 jump starts, let it rest for several minutes - 15 minutes according to the manual. To be sure about the exact jump-start procedure, read the manual thoroughly and check the video again.

GB20 jump starter can be used to charge other devices as well, but having the jump starter fully charged is perhaps of more importance than having a tablet or similar device recharged.

On the other hand, when the phone battery is discharged, if required, it can be charged quickly and used for badly needed distress calls. If somebody wants to deplete the jump start battery just to be able to see what is happening online or something similar, forget charging it using the jump starter! IMHO, of course :)

For more reviews and recommendations, check NOCO Genius Boost Sport GB20 400 Amp Amazon link.

NOCO Genius Boost Plus GB40 1000 Amp 12V UltraSafe Lithium Jump Starter

noco gb40 w400pxGB40 is very similar to the GB20 jump starter. It can provide 7000 J of energy in a 3-second burst, with a peak current of 1000 Amps.

It can be used to jump-start gas engines up to 6 liters and diesel engines up to 4 liters in displacement. This is enough for most cars and most smaller fishing and leisure boats.

It has the same battery capacity of 24 Wh, with all other features practically the same, except that it is a slightly heavier unit - 2.4 vs 2.1 pounds and has battery clamps designed for larger currents.

NOCO Genius Boost Plus GB40 is a very popular jump starter model and is often the first choice of many car owners. It comes at an acceptable price and delivers excellent performances for such a price.

Boat and truck owners often prefer larger and stronger GB70 model.

For more reviews and recommendations, check NOCO Genius Boost Plus GB40 1000 A Amazon link.

NOCO Genius Boost HD GB70 2000 Amp 12V UltraSafe Lithium Jump Starter

noco gb70 w400pxGB70 is a much stronger unit than GB20 and GB40. It has a much larger lithium battery, which now stores 55 Wh of energy. It is capable of delivering 15700 J of energy in 3-second burst, with a maximum peak current of 2000 Amps. And that is some serious power and current!

GB70 is designed for gas engines up to 8 liters and diesels up to 6 liters. Due to the larger battery, it can jump start large engines up to 40 times, just be sure to let the unit cool down after each use - again, read the manual.

After all, if your engine doesn't start after 3-4 attempts, there is probably something else that is preventing your engine from starting, not the faulty battery.

Just like the GB20 and GB40 units, the GB70 unit also has 2.1 Amps USB input and output, but it also has XGC input for 12 V, 3 Amp fast charge, and XGC 12V 5 Amp output for other appliances like the tire compressor or similar.

While GB20 and GB40 units can be charged only via USB input, GB70 can be charged via USB input (rather slow, even when charging using 2 Amps chargers) or via 12V/3A XGC input, which is much faster since it takes only 2-3 hours to fully charge fully discharged unit.

Note: After charging, let the unit rest and cool down before its first use.

GB70 weighs 5 pounds, while GB40 weighs 'only' 2.4 pounds. LED flashlight is 4x stronger than the flashlights in the GB20 and GB40 models.

For more reviews and recommendations, check NOCO Genius Boost HD GB70 2000 Amp Amazon link.

NOCO Genius Boost Pro GB150 4000 Amp 12V UltraSafe Lithium Jump Starter

noco gb150 w400pxGB150 is the largest unit in this jump starters group. It is based on an 88 Wh lithium battery and is capable of providing 22500 J of energy within 3 seconds, with a maximum current of 4000 Amps!

This is some serious energy - for example, a 100 W light bulb must be turned on for almost 4 minutes in order to 'consume' 22500 J of energy. Or, for those three seconds, GB150 can supply 7.5 kW constantly.

Hence, GB150 is designed for gas and diesel engines of up to, or even more than 10 liters in displacement - cars, trucks, yachts, ships, etc.

Also, it is the most expensive unit and the largest one - it weighs 7.5 pounds, and it is large enough NOT to fit in the glove compartment of most cars :)

GB150 comes with the strongest LED flashlight (500 lumens vs. 400 lumens on GB70 and 100 lumens on GB40 and GB20), and it also comes with a built-in voltmeter for checking the battery before jumping starting the engine.

Since digital voltmeters are such cheap and simple units, IMHO, GB20, GB40, and GB70 units should have one, too - I hope future models will have them.

For more reviews and recommendations, check NOCO Genius Boost Pro GB150 4000 A Amazon link.


burning rubber w600px

Long story short - NOCO Genius Boost Jump Starters will do their job when used as they are supposed to be used.

When the engine does not start, people get nervous and tend to do things quickly.

If that happens to you, take a few deep breaths, keep calm, and start your engine(s) with these starters as you would normally do. If the engine(s) won't start, your battery is not a problem ...