Would the GB20 start a 2l Diesel engine?i know it says not recommended for diesel, but why?

To answer the "why" part of your question, diesel engines have a much higher cylinder compression ratio, often reaching 18:1, compared to a petrol engine of around 12:1. This requires a higher torque from the starter motor to crank the engine, which itself draws more current from the battery. Also, the glow plugs in a diesel draw current to heat up, so this adds a little more to the drain on a battery.

How long does it hold its charge for?

It is rated to hold up to 70% charge for over 1 year.

Can I use this to jump start a Toyota Prius (hybrid)?

I also used this with great success on my Toyota CH-R 2.0 litre Hybrid

Is this unit a potential fire hazard if carried in top box or other compartments on a motorbike.

Only if you break the case and expose the battery. Not an easy thing to do.

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Boost GB20: 500A UltraSafe Jump Starter Power Pack – 12V Car Battery Booster, Portable Power Bank & Jump Leads - For 4.0L Petrol Engines

Boost GB20: 500A UltraSafe Jump Starter Power Pack – 12V Car Battery Booster, Portable Power Bank & Jump Leads - For 4.0L Petrol Engines

Product ID: 49264927

Details

Battery cell composition
Lithium Ion
Brand
NOCO
Product dimensions
11.7D x 20.8W
Vehicle service type
Boat Moto Car
Voltage
12 Volts

⚡500A peak lithium power

🔋Up to 20 starts per charge

🔦100-lumen LED flashlight

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VT50351

Duties & taxes included

In stock

Sold byAmazon VanuatuDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power up your peace of mind—jumpstart, charge, and shine anywhere, anytime!

SAFETY FIRST TECH - Patented spark-proof and reverse polarity protection ensures foolproof, worry-free connections every time.
INSTANT POWER SURGE - 500 amps of peak lithium power to jumpstart engines up to 4.0L petrol—never get stranded again.
ALL WEATHER DURABILITY - Rugged IP65-rated housing guards against water, dust, and impact—ready for any adventure or emergency.
MULTI DEVICE POWER BANK - Integrated USB-C rechargeable power bank charges smartphones, tablets, and more in critical moments.
COMPACT EMERGENCY ESSENTIAL - Lightweight 2.4 lb design fits perfectly in your glove box or emergency kit—power on the go.

The NOCO Boost GB20 is a compact, ultra-safe 500A lithium jump starter designed for 12V vehicles with engines up to 4.0L petrol. It delivers up to 20 jump starts per charge, features patented spark-proof and reverse polarity protection, and doubles as a portable power bank with a 100-lumen LED flashlight. Rugged and lightweight, it’s engineered for reliable emergency power and convenience on the road.

Specifications

ASIN	B015TKPT1A
Amperage	500 Amps
Automotive Fit Type	Universal Fit
Battery Capacity	500 Amp Hours
Battery capacity	500 Amp Hours
Battery cell composition	Lithium Ion
Best Sellers Rank	186 in Automotive ( See Top 100 in Automotive ) 4 in Car Battery Jump Starters
Brand	NOCO
Brand Name	NOCO
Compatible with Vehicle Type	Boat, Moto, Passenger Car
Country Of Origin	China
Customer Reviews	4.6 out of 5 stars 12,643 Reviews
EU Spare Part Availability Duration	1 Years
Global Trade Identification Number	00046221150018
Included Components	GB20 Jump Starter Power Pack, Microfiber Storage Bag, USB Charging Cable, User Guide for Jump Starter, Warranty Information for Jump Starter
Item Dimensions D x W x H	11.7D x 20.8W x 10.7H centimetres
Item Type Name	Jump Starter
Item Weight	454 g
Manufacturer	NOCO
Manufacturer Part Number	GB20
Manufacturer Warranty Description	1-Year Limited
Model Number	GB20
Peak Output Current	500 Amps
Product dimensions	11.7D x 20.8W x 10.7H centimetres
Specification Met	UL
UPC	046221150018
Unit Count	1.0 count
Vehicle service type	Boat, Moto, Passenger Car
Voltage	12 Volts
battery-cell-composition	Lithium Ion

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