400 Amp UltraSafe Lithium Jump Starter
The GB20 is a portable lithium-ion battery jump starter pack that delivers
400-amps (4,650 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. Designed for a
car, boat, motorcycle, RV and more with gas engines up to 4 liters.
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. Simply turn on
the LED flashlight, recharge a USB device, or use manual override for
deeply discharged batteries.
8X smaller and lighter.
Compact, pocket-sized lithium jump starter that fits perfectly in
your glove box. It is eight times smaller and lighter than
traditional battery booster packs.
Multi-function jump starter.
Jump start cars, motorcycles, ATVs, UTVs, snowmobiles, personal
watercrafts, and lawn & garden equipment. Even recharge USB devices,
like a smartphone, tablet and much more.
Jump starts per charge.
A powerful lithium jump starter capable of jump starting up to 20
vehicles on a single charge. It is rated for over 1,000 charge
cycles and holds its charge level for over a year with minimal power
Stay charged. Power your USB devices on the go.
How many times will a GB20 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