12V 500A Jump Starter NOCO GB20

12V 500A lithium jump starter – NOCO Boost Sport GB20

The GB20 is sized for small and mid-sized petrol cars: its rating stops at 4.0 L, and no diesel figure is given for it. Within that envelope, 500A of peak current is enough for as many as 20 starts before the 24 Wh lithium pack needs topping up, which takes about 3 h from a 2A USB charger.

Connection safety relies on NOCO's UltraSafe logic, spark-proof and guarded against reversed clamps. It recognises 12V lead-acid batteries (AGM, EFB, gel, MF or flooded) from 2V upwards; below that threshold a manual override takes over.

Beyond starting, the unit works as a 5V, 2.1A USB power bank and carries a seven-mode LED torch of 100 lumens.

Technical data

How to size it

• —  Engine ceiling: 4.0 L petrol. No diesel rating is listed for the GB20.
• —  Charge reserve: up to 20 starts per full charge.
• —  Next step up: the Boost Plus GB40 doubles the peak to 1000A and covers 6.0 L petrol and 3.0 L diesel.
• —  System voltage: 12V only. Trucks and machinery on 24V call for the GB251+ or the GB500+.

Features

• —  Peak output of 500A, intended for 12V lead-acid systems.
• —  Engine rating: petrol up to 4.0 L (no diesel figure published).
• —  Autonomy: as many as 20 jump starts between charges.
• —  Energy storage: 24 Wh lithium-ion battery.
• —  Battery types accepted: AGM, EFB, gel, MF and flooded lead-acid.
• —  Detection threshold of 2V, with manual override for flatter batteries.
• —  USB port in and out at 5V, 2.1A; full recharge in about 3 h with a 2A charger.
• —  100-lumen torch offering seven modes, SOS and strobe among them.
• —  IP65 rating with ports closed; usable between -20 °C and +50 °C, charged between 0 °C and +40 °C.

In the box

• —  NOCO Boost Sport GB20 jump starter
• —  HD precision battery clamps
• —  USB charging cable
• —  Microfibre storage bag
• —  User guide