How do I charge the Stanley Jump Starter?

You can charge the unit using either a 120V AC outlet or a vehicle's 12V DC outlet. For AC charging, connect the USB Charging Cable to the 120V AC/USB Charging Adapter, plug it into a wall outlet, and insert the cable into one of the dual USB ports under the protective cover. For 12V DC charging, use the 12V DC/USB Charging Adapter plugged into the vehicle's accessory outlet. In either case, the backlit LCD screen will display charging status, and the unit will automatically shut down when fully charged.