This mini power pack is not much bigger than your cell phone, but in an emergency can deliver up to a peak 400 amps of power to jump start your car. In everyday use, it's a great way to charge all your portable electronic devices, especially if you're driving a car with no cigarette lighter to plug into. Besides the jumper cable hookup, it also has a USB port and universal laptop charger adapter. With just 3 hours of charge time, this lithium ion battery pack can charge laptops, cameras, cell phones, etc. It can also be plugged in and recharged through the 12-volt power port in your car. This portable power bank is great for camping and off-roading because it has a high-powered LED lamp.