The Snap-on Tools 12V Li-Ion Compact Engine Starter/USB Charger and Light, No. EEJP201MBK, is a compact, portable engine starter offering safer starting due to reverse polarity, thermal runaway, and short-circuit protection. Its internal 12V Li-Ion battery charges from an AC wall outlet or DC vehicle port then jumps sport, motorcycle, and four-eight cylinder vehicles, even below freezing. It features an LED work light with SOS flash mode, USB port for phone charging, and is memory saver capable with an optional cable. A safety override for vehicle batteries with <1.5V DC, prompts the technician to check battery condition. The back-lit, LCD onscreen commands guide the user to "Engine Start Ready."