LEPOWER Wrench J1 Ultra-safe Car Jump Starter/Portable Power Bank for Electronics Devices/Large Capacity 12,000mah Ultra-safe and error-proof with built-in integrated protection system: overcharge protection, over discharge protection, reverse polarity protection and short-circuit protection. Large capacity battery can support 6.0L or under gasoline powered vehicle engines and 4.0L or under diesel powered vehicle engines. Portable multi-functional battery with charging adapters, supports all 5V, 12V, 19V major electronic devices, including laptops, cell phones, and much more. The new design of the LED display indicates the battery level percentage and the current of the device when charging. Unique design of wrench includes ultra-bright LED flashlight, strobe light and SOS signal light that can be used to help you navigate safely in the dark.