NOCO Boost GB20 500A 12V Lithium Jump Starter vs NOCO Boost X GBX75 2500A 12V Lithium Jump Starter
These are side-by-side facts taken from each product guide: published specifications, strengths and caveats as their sources state them. This page is not a test, a ranking or a verdict about which model is better.
NOCO Boost GB20 500A 12V Lithium Jump Starter
Gas engines up to 4.0 litres, motorcycles and powersport
The GB20 is NOCO's 500-amp pack on a 24 Wh lithium battery, rated for gas engines up to 4.0 litres. NOCO's own spec sheet lists diesel as Not Recommended. It ships with narrow powersport clamps, and its manual override for sub-2-volt batteries turns off both safety protections.
Published specifications
- NOCO: 500 A peak; gas up to 4.0 L; diesel listed as Not Recommended
- NOCO: 24 Wh lithium-ion battery; USB-C in and USB out at 5V 2.1A
- Guide: recharge about 3 h at 2 A, 6 h at 1 A, 12 h at 0.5 A
- Guide: no more than 5 consecutive starts in 15 minutes, then rest 15 minutes
- Guide: operate -20°C to +50°C; charge 0°C to +40°C; store -20°C to +50°C
- Box: GB20, powersport clamps, USB-C to USB-C cable, microfiber bag
Strengths
- Spark-proof and reverse-polarity protection in normal use, with an IP65 housing
- Powersport clamps reach the tight terminals on motorcycles and small machines
- NOCO publishes the full user guide, tech specs and warranty text for this model
Caveats
- NOCO's own spec sheet lists diesel as Not Recommended, and gas only to 4.0 L
- Manual override disables both protections and can push up to 500 amps
- Guide and specs page disagree on weight and size (2.4 lb vs 2.1 lb)
Read the full NOCO Boost GB20 500A 12V Lithium Jump Starter guide
NOCO Boost X GBX75 2500A 12V Lithium Jump Starter
Gas engines to 8.5L and diesels to 6.5L on 12V lead-acid
The GBX75 is NOCO's 2500-amp Boost X on a 74 Wh pack, rated for 8.5-litre gas and 6.5-litre diesel engines. Boost runs in 60-second bursts and must be power-cycled between them, and it refuses to jump start at all when its Cold or Hot LED is solid.
Published specifications
- NOCO: 2500 A peak; gas up to 8.5 L, diesel up to 6.5 L; 12V lead-acid only
- NOCO: 74 Wh lithium-ion; USB-C in and out to 20V 3A; USB-A out 5V 2.1A
- Guide: about 1.7 h to recharge at 60W, about 20 h from a 5W charger
- Guide: 60-second boost timeout; power off and on to start another attempt
- Guide: operate -20°C to +50°C; charge 0°C to +40°C; store -20°C to +50°C
- Guide: 1-year limited warranty, non-transferable, RMA required for a claim
Strengths
- Rated for diesel up to 6.5 litres as well as 8.5-litre gas engines
- 60W USB-C Power Delivery in and out, with about a 1.7-hour recharge
- Clear Cold, Hot and numbered error codes instead of one vague fault light
Caveats
- Manual override disables the protections and the 60-second timeout together
- Charging from a 5W phone brick takes about 20 hours by NOCO's own table
- Will not jump start at all while the Cold or Hot LED is solid
Read the full NOCO Boost X GBX75 2500A 12V Lithium Jump Starter guide
How to choose between them
Choose the NOCO Boost GB20 500A 12V Lithium Jump Starter if your situation matches: Gas engines up to 4.0 litres, motorcycles and powersport. Its main caveat: NOCO's own spec sheet lists diesel as Not Recommended, and gas only to 4.0 L.
Choose the NOCO Boost X GBX75 2500A 12V Lithium Jump Starter if your situation matches: Gas engines to 8.5L and diesels to 6.5L on 12V lead-acid. Its main caveat: Manual override disables the protections and the 60-second timeout together.
Both entries repeat what each guide records. Confirm the model, included parts and availability on the current listing before ordering.
Primary sources
- NOCO GB20 user guide and warranty, dated 03.07.2025A Source for NOCO Boost GB20 500A 12V Lithium Jump Starter
- NOCO tech specs page for the GB20 500A jump starter Source for NOCO Boost GB20 500A 12V Lithium Jump Starter
- NOCO GB20 how-to page with LED, button and troubleshooting tables Source for NOCO Boost GB20 500A 12V Lithium Jump Starter
- NOCO GBX75 user guide and warranty, English section (listing-supplied) Source for NOCO Boost X GBX75 2500A 12V Lithium Jump Starter
- NOCO tech specs page for the GBX75 2500A Boost X jump starter Source for NOCO Boost X GBX75 2500A 12V Lithium Jump Starter
Primary sources checked .