There are all sorts of portable laptop chargers designed for smartphones, tablets, laptops, and mobile gaming systems, but the Halo Bolt outshines them all in one fundamental way: it can also jump start your car. This heavy-duty, portable charger proves to be a handy tool, especially in the car, whether it’s for emergencies or when you need to charge a device while you’re away from home.

Granted, it doesn’t have as much power as some dedicated laptop chargers, which might be a better option for that need. Still, the added versatility gives the Halo Bolt a unique advantage in the market. I tested the Halo Bolt for a week with multiple devices, including laptops and smartphones.

While the Halo Bolt is certainly portable, it’s not designed to fit in your pocket. This large battery measures 7.2 x 1.6 x 3.8 inches (HWD) and weighs over 1.5 pounds. There are smaller, cheaper battery packs available for smartphones, but this beast is made for heavier demands and is designed accordingly.

It’s made of mostly thick black plastic on the outside, with a glossy brushed silver finish with a Halo logo on it. The front is where most of the ports are located, including two USB-A ports (5V/2.4A), a DC input for the charging adapter, and jump-start inputs hidden behind a small door. The right side, meanwhile, has the 115V AC/65W max AC power plug input for laptop chargers and other plug-in devices.