Description
Tab panes Compact portable jump starting
NOCO GBX45 Boost X 1250A Lithium Jump Starter
The NOCO GBX45 Boost X is a compact 12V lithium jump starter delivering up to 1250 amps of peak starting current. Suitable for petrol engines up to 6.5 litres and diesel engines up to 4.0 litres, it combines UltraSafe 2.0 protection, rapid USB-C charging, portable device charging and a 100-lumen LED torch.
1250A Peak starting current 6.5L Maximum petrol engine size 4.0L Maximum diesel engine size 12V Lead-acid starting batteries
Portable starting power for everyday vehicles
Delivering up to 1250A of peak starting current, the NOCO GBX45 provides dependable emergency starting assistance for 12V vehicles with petrol engines up to 6.5 litres or diesel engines up to 4.0 litres.
Its compact rechargeable design makes it suitable for cars, SUVs, vans, small trucks, boats, motorcycles, ATVs and other equipment fitted with a compatible 12V lead-acid starting battery.
Key features
1250A peak output
Provides powerful emergency starting assistance for compatible petrol and diesel engines.
UltraSafe 2.0
Spark-proof technology and reverse-polarity protection help prevent incorrect connections during normal use.
60W USB-C Power Delivery
The bidirectional USB-C port supports rapid recharging and powers compatible USB-C portable devices.
Rapid recharge
Recharge the GBX45 in approximately 48 minutes using a compatible 60W USB-C Power Delivery source.
100-lumen LED torch
Multiple brightness settings, SOS and emergency strobe modes provide practical roadside illumination.
IP65 protection
The rugged housing carries an IP65 rating when the USB port covers are correctly closed.
Suitable applications
Cars and SUVs
Compact emergency starting power for compatible petrol and diesel passenger vehicles.
Vans and small trucks
A practical roadside or workshop tool for compatible 12V light commercial vehicles.
Marine and leisure
Suitable for boats and leisure equipment using compatible 12V lead-acid starting batteries.
Motorcycles and powersports
Portable starting assistance for motorcycles, ATVs and other compatible 12V equipment.
From 0% to jump-starting power in approximately five minutes
When the GBX45’s internal battery is flat, a compatible 60W USB-C Power Delivery source can provide sufficient energy for a jump-start attempt in approximately five minutes. A suitable 60W power source is required to achieve the fastest charging performance.
How to jump start a vehicle
Check compatibility
Confirm that the vehicle uses a 12V lead-acid starting battery and is within the stated engine limits.
Attach the clamps
Connect the red clamp to positive and the black clamp to negative or a suitable vehicle earth point.
Switch on
Turn on the GBX45 and check that the Boost indicator confirms the connection is ready.
Start the vehicle
Start the vehicle within the 60-second Boost window, then switch off the unit before disconnecting it.
Please note: Read the NOCO user guide before use. Do not jump start damaged, frozen, 6V, 24V or lithium vehicle batteries.
Product details
Compatible engines and batteries
- For 12V lead-acid starting batteries only
- Petrol engines up to 6.5 litres
- Diesel engines up to 4.0 litres
- Compatible with wet-cell and flooded batteries
- Compatible with AGM and gel batteries
- Compatible with maintenance-free and EFB batteries
- Suitable for compatible hybrid vehicle 12V starting batteries
The GBX45 is not suitable for jump starting 6V or 24V batteries and must not be used to jump start lithium vehicle batteries. UltraSafe 2.0 safety technology
UltraSafe 2.0 combines spark-proof technology with reverse-polarity protection, enhanced thermal efficiency and intelligent power management.
- Spark-proof connection during normal operation
- Reverse-polarity detection
- Hot and cold temperature indicators
- Error indication system
- Automatic 60-second power-conservation timer
Manual Override Mode
The GBX45 normally detects 12V batteries down to approximately 3V. Manual Override can activate the jump-start output when the battery voltage is too low for automatic detection.
Warning: Manual Override disables spark-proof and reverse-polarity protection. It should only be used by an experienced operator after checking the battery voltage, polarity and connections. USB-C charging and power bank
- Bidirectional USB-C Power Delivery input and output
- Up to 60W USB-C input
- Up to 60W USB-C output
- USB-A output rated at up to 10W
- Approximately 48-minute recharge using a compatible 60W source
- Approximately five minutes from empty to jump-starting power
- Charges compatible phones, tablets, laptops and USB devices
Charging performance depends on the power source used. A compatible 60W USB-C Power Delivery source is required to achieve the fastest recharge time. 100-lumen LED torch
The integrated 100-lumen LED torch provides useful lighting for roadside emergencies and low-light engine-bay work.
- 100%, 50% and 10% brightness levels
- Emergency flashing mode
- Strobe mode
- SOS signalling mode
Technical specifications
| Specification | NOCO GBX45 |
|---|---|
| Battery voltage | 12V |
| Compatible battery type | 12V lead-acid |
| Peak starting current | 1250A |
| Maximum petrol engine size | 6.5 litres |
| Maximum diesel engine size | 4.0 litres |
| Internal battery | 31Wh lithium-ion |
| USB-C input | Up to 60W Power Delivery |
| USB-C output | Up to 60W Power Delivery |
| USB-A output | 5V DC, 2.1A maximum / 10W maximum |
| LED torch | 100 lumens |
| Ingress protection | IP65 with port covers closed |
| Operating temperature | -20°C to +50°C |
| Charging temperature | 0°C to +40°C |
| Dimensions | 173.4mm × 83.15mm × 52.85mm |
| Weight | Approximately 0.59kg |
| Warranty | 1-year limited manufacturer warranty |
What is included?
- NOCO GBX45 Boost X lithium jump starter
- Heavy-duty precision battery clamps
- 24-inch USB-A to USB-C charging cable
- Microfibre storage bag
- User guide and warranty information
Frequently asked questions
What size engine can the GBX45 jump start?
The GBX45 is rated for petrol engines up to 6.5 litres and diesel engines up to 4.0 litres when used with a compatible 12V lead-acid starting battery.
Can the GBX45 jump start a 24V vehicle?
No. The GBX45 is designed exclusively for compatible 12V lead-acid starting batteries.
Can it jump start a lithium vehicle battery?
No. Although the GBX45 contains an internal lithium-ion power source, its jump-starting output is intended only for 12V lead-acid vehicle batteries.
Is the GBX45 a battery charger?
No. It provides high-current starting assistance but does not recharge or maintain the vehicle battery. Use a suitable NOCO Genius charger for battery charging and maintenance.
How quickly can the GBX45 be recharged?
A compatible 60W USB-C Power Delivery source can fully recharge the GBX45 in approximately 48 minutes. Lower-power USB sources will take longer.
Does the GBX45 include a USB mains charger?
No. A USB-A to USB-C charging cable is supplied, but a mains power adapter is not included. A compatible 60W USB-C Power Delivery charger is required for the fastest charging performance.
Is the GBX45 suitable for outdoor use?
The housing is rated IP65 when the port covers are closed. It should not be submerged, and the ports must remain protected from water and contamination.
Compact starting power with NOCO Boost X
Explore our NOCO jump starters and battery chargers or contact our team for help choosing the correct model for your vehicle.
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Brand: NOCO
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