GOOLOO GP4000 4000A 12V Jump Starter vs NOCO Boost GB20 500A 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.
GOOLOO GP4000 4000A 12V Jump Starter
Larger gas and diesel engines, plus 12V accessory power
The GP4000 is a 4000-amp pack that GOOLOO rates for all gas engines and diesels up to 10 litres, with a 150-watt 12V output and a cigarette-lighter adapter. Its manual limits you to three consecutive starts two minutes apart and asks for a 30-minute cool-down before recharging.
Published specifications
- Manual: GP4000 (Epower-137B), 4000 A peak, 800 A starting current
- Manual: capacity given as 74Wh/5000mAh on GOOLOO's site, 99.2Wh on the listing copy
- Manual: max 3 consecutive starts, 2 minutes apart; cool 30 min before recharging
- Manual: full charge 6-8 hours at 5V/3A; wall charger not included
- Manual: operate -20°C to 60°C; charge only at -10°C to 45°C; recharge every 3 months
- Manual: 18-month warranty, original purchaser with receipt or order ID
Strengths
- Smart cable reads out connection, reverse polarity and low voltage on one light
- 15V/10A DC output and a cigarette-lighter adapter for running 12V accessories
- GOOLOO publishes a full text manual, a troubleshooting guide and clear usage limits
Caveats
- Three published battery capacities for one model: 74Wh, 99.2Wh and 24000 mAh
- Only three consecutive starts, and no recharging for 30 minutes afterwards
- The manual lists yachts as supported and then forbids use on boats
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
How to choose between them
Choose the GOOLOO GP4000 4000A 12V Jump Starter if your situation matches: Larger gas and diesel engines, plus 12V accessory power. Its main caveat: Three published battery capacities for one model: 74Wh, 99.2Wh and 24000 mAh.
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.
Both entries repeat what each guide records. Confirm the model, included parts and availability on the current listing before ordering.
Primary sources
- GOOLOO GP4000 user manual, English section (maker manuals index copy) Source for GOOLOO GP4000 4000A 12V Jump Starter
- GOOLOO product manuals index listing the GP4000 manual Source for GOOLOO GP4000 4000A 12V Jump Starter
- GP4000 manual revision attached to the listing, with a different specification table Source for GOOLOO GP4000 4000A 12V Jump Starter
- GOOLOO GP4000 jump starter troubleshooting guide, updated June 16, 2026 Source for GOOLOO GP4000 4000A 12V Jump Starter
- 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
Primary sources checked .