Start the vehicle within 60 seconds after pressing the power button on Boost. After the 60-second timeout is complete, the unit must be powered off, then back on, to initiate a new jump-start sequence.
We took our UltraSafe technology and made it better— UltraSafe 2.0. It's still our simple, mistake-free design featuring spark-proof technology and reverse polarity protection, but with enhanced thermal efficiency and power management to provide better performance and longer battery life.
With two built-in 2.1A USB ports, you can power multiple devices at the same time, such as smartphones, tablets, action cameras, wireless headphones, wearables and more. With over 242 watt-hours of lithium power, the GB250+ can provide endless hours of operation and recharge your devices multiple times before needing a recharge.
From 0-100% 4X Faster. Charge directly from the vehicle's 12-volt auxiliary port or the XGC4 4-Amp Power Adapter to recharge it’s 242 watt-hours lithium-ion battery in 8.5 hours.
More than a jump starter, Boost MAX is a useful tool for daily use and emergency situations alike. The GB250+ is equipped with a 600-Lumen LED flashlight with various brightness modes, SOS, and emergency strobe— handy to have as a roadside or road trip tool.
Integrated Voltmeter / 60 Second Countdown Timer. The Boost MAX GB250+ is equipped with an integrated voltmeter to help pinpoint battery issues. The voltmeter doubles as a 60-second countdown timer, which shuts off GB250+ after 60 seconds to help preserve internal battery charge.
Technical Specifications
What’s in The Box
- GB250+ Lithium Battery Jump Starter
- 56-Watt XGC Power Adapter
- 12-Volt 2-Foot XGC Cable
- Protective Carrying Case
- User Guide & Warranty Information
Starting Current
5250 Amps (Peak)
Voltage
12V
Battery Types
12V Lead-Acid Battery Systems
Internal Battery
242 Watt-Hour Lithium-Ion
Operating Temperature
-4°F to 122°F (-20°C to +50°C)
Charging Temperature
32°F to 104°F (0°C to +40°C)
Storage Temperature
-20°C to +50°C
USB (Output)
Dual 5V, 2.1 Amps
Cooling
Natural Convection
Dimensions (LxWxH)
12.4 x 6.1 x 3.7 in
Weight
14.7 lbs
12V XGC (Input)
12V @ 4 Amp
12V XGC (Output)
12V @ 15 Amp
Gas Engine Rating
Up to 16.0 L, Safe On All Engine Sizes
Diesel Engine Rating
Up to 16.0 L, Safe On All Engine Sizes
LED Worklight
600-Lumens