The GB40 is a portable lithium-ion battery jump starter pack that delivers 1,000-amps (7,000 J3S) for jump starting a dead battery in seconds. It features a patented safety technology that provides spark-proof connections and reverse polarity protection making safe and easy for anyone to use. It’s a powerful battery booster that doubles as a portable power source for recharging USB devices, like a smartphone, tablet and more. And designed for a car, boat, RV, truck and more with gas engines up to 6 liters, and diesel engines up to 3 liters.
- A lithium battery jump starter rated at 1,000 Amps (7,000 Joules3S).
- Spark-proof connections and reverse polarity protection.
- Recharges USB devices, like smartphones, tablets, and more.
- 100 lumen LED flashlight with multiple modes, including SOS.
- Jump starts gas engines up to 6 liters, and diesel up to 3 liters.
- Provides up to 20 jump starts on a single charge.
Everything you need on one interface
We designed the user interface to be simple and easy to understand. LED status indicators display the internal lithium batteries charge level and charging status. Error indicators show when connected in reverse polarity or temporarily disabled for thermal protection. Or simply turn on the LED flashlight, recharge a USB device, or use manual override for deeply discharged batteries.
Stay charged. Power your USB devices on the go
How many times will a GB40 recharge my device?
The built in 2.1A USB out port can power all of your USB devices, such as smartphones, GoPro cameras, wireless headphones, and more. The battery capacity inside of your iPhone, for example, is measured in “milliamp-hours,” or mAh—a way of measuring how long the device will last. Devices that are frequently being used, like phones and cameras, often require more power to run all day than the device’s battery is rated for. Boost’s battery pack extends the life and running time of your device. Plus, powering your device from an external battery pack will reduce the internal battery’s charge cycles, extending the usable life.