This thing is small, boost starts your car and never ever sparks even when hooked up to wrong terminals! This is so easy even a beginner can use it safely!
It is USB rechargeable. Any qualified USB AC Adapter, Car Charger, Laptop or any other USB powered port can recharge the device.
It can recharge all generations of smartphones on the market, as well as, HD action cameras, tablets, music players, wireless speakers and more.
LED flashlight as well, see 2nd pic.

Technical Specifications:
Internal Battery: Lithium Ion
Peak Current Rating: 400A
Operating Temperature: -30°C (-22ºF) to +50°C(122ºF)
Micro USB (Input): 5V, 2.1A
USB (Output): 5V, 2.1A
Housing Protection: IP65 (w/Ports Closed)
Dimensions (L x W x H): 6.7 x 3.2 x 1.7 Inches
Weight: 1lb (2.1lb w/clamps)

More info: GB30 12V Lithium Jump Starter | NOCO Genius

VIDEO: Boost? Vs. Everyone Else - The Portable Lithium Ion Battery Jump Starter | NOCO Genius Boost UltraSafe GB30 on Vimeo

 

Genius!