Suaoki D21 500A Peak 15000mAh Portable Car Jump Starter Power Bank Battery Booster with Dual USB Charging Port LCD Screen Smart Clamp Charger for SLR Laptop Cell Phone Tablet High Capacity: a battery with a peak current of 500A provides enough power to jump start most 12V vehicles Multi-functional: a 12/16/19V DC output with multiple adapters which fit most plugs and 2 USB 2.1A outputs let you charge and use your laptop, smartphone, or other electronics Suaoki TIR-C Technology: a built-in intelligent chip automatically adjust the output of each USB port, meaning that your gadgets always charge fast and efficient, without getting damaged in the process Smart Safety Clamps: a built-in controller on the clamps will work only when a correct connection to the car battery is made, and will prevent any short circuit or reverse charge/connection issues Portable and Convenient: the unit's small size allows it to fit into the convenient, sturdy, and roomy carrying bag with all of the accessories, allowing utmost mobility and portability