In real-world cranking these two are closer than the price gap suggests — both start V8 gas engines — but they differ in what you're paying for. The NOCO's ratings are conservative, its clamps are the safest in the business, and its reliability record runs a decade; the GOOLOO gives you a bigger power bank, USB-C charging, and a 12V port for less than half the money, with a lighter build and a shorter expected life. Budget buyers who'll check the pack monthly do fine with the GOOLOO; buy-once buyers want the NOCO.

Pick the NOCO if…

✓You want the pack to work in ten years without thinking about it
✓Clamp safety and conservative ratings matter to you
✓Diesel up to 6.0L

Pick the GOOLOO if…

✓Budget is the deciding factor
✓You'll use it as a phone/tablet power bank on road trips
✓You're disciplined about recharging it monthly

Spec by spec

Spec	NOCO Boost HD GB70	GOOLOO GP4000
Our score	9.2 / 10	8.3 / 10
Peak amps	2,000A	4,000A (manufacturer rating)
Engine rating	Gas up to 8.0L / diesel up to 6.0L	Gas up to 10.0L / diesel up to 8.0L (manufacturer claim)
Battery	Lithium-ion, 12V systems only	26,800mAh lithium-ion, 12V systems only
Ports	12V DC out, USB-A out, micro-USB in (check current revision)	USB-C PD in/out, USB-A out, 12V DC out
Flashlight	400 lumens, 7 modes incl. SOS	LED with strobe and SOS
Safety	Spark-proof, reverse polarity, over-charge, short-circuit; manual override	Reverse polarity, short-circuit, over-current, over-temp; smart clamps
Operating temp	-4°F to 122°F (-20°C to 50°C)	-4°F to 140°F (manufacturer)
Ingress rating	IP65	—
Weight	~5 lb	~2.8 lb
Warranty	1 year	1 year

Still deciding?

Read the full reviews for the complete story, or check both current prices — sale pricing swings this class of decision all the time.

~$200 typical price

Buy on Amazon

~$80 typical price

Buy on Amazon