NOCO Boost Max GB250+ 5250 UltraSafe Jump Starter Power 12V Battery Booster

The NOCO Boost Max GB250+ is a commercial-grade 12V lithium jump starter rated at 5250 A peak, capable of starting petrol and diesel engines up to 16 litres. It belongs to NOCO's Boost Max range and is designed for heavy vehicles and equipment including lorries, coaches, buses, motorhomes, and agricultural or construction machinery.

Key specifications

• Starting current: 5250 A (peak)
• Engines: petrol and diesel up to 16 litres
• Battery type: 12V lead-acid
• Internal battery: 242 Wh lithium-ion
• USB output: dual 5V, 2.1A max
• XGC: 12V 4A input, 12V 15A output
• Recharge: 8.5 hours via 12V socket or XGC4 4A adapter
• Torch: 600-lumen LED with SOS and strobe
• IP rating: IP65 (ports closed)

Commercial-grade jump starting for heavy vehicles and equipment

• Rated at 5250 A
• Petrol and diesel engines up to 16.0 litres
• Jump starts 12V batteries

The GB250+ delivers over 5250 A of starting power for the most demanding engine starts. It jump starts almost every type of vehicle and equipment — including semi-trucks up to class 8, motorhomes, coaches, buses, and mining, agricultural, construction and vocational equipment — across 6, 8, 12 and 16-cylinder engines. If you need a jump starter for lighter vehicles, the NOCO Boost range is also available in smaller outputs such as the NOCO Boost GB40 1000A and the NOCO Boost GB20 500A.

Spark-proof. Reverse polarity protection.

The GB250+ uses NOCO's UltraSafe 2.0 technology — a spark-proof, mistake-free design with reverse polarity protection, enhanced thermal efficiency and improved power management for better performance and longer battery life.

Start vehicle within 60 seconds. Auto power conservation.

Press the power button and start the vehicle within 60 seconds. Once the 60-second sequence times out, power the unit off and back on to initiate a new jump-start sequence. The yellow power LED indicates the sequence has ended and is ready to reset.

Charge devices. USB charge and recharge.

Two built-in 2.1A USB ports let you charge multiple devices simultaneously — smartphones, tablets, action cameras, wireless headphones and more. With 242 Wh of lithium power, the GB250+ can recharge devices multiple times before needing a top-up itself.

Rapid recharge.

Recharge from 0–100% via the vehicle's 12V auxiliary port or the XGC4 4A Power Adapter. Full charge takes 8.5 hours.

Ultra-bright LED torch.

The GB250+ includes a 600-lumen LED torch with multiple brightness modes, SOS and emergency strobe — a practical tool for roadside use and emergencies.