What does the "circle button" do?The circle button is used to:
• Turn on the display (once the power switch is on) to see charge level and status.
• Toggle the laptop output voltage between 12, 16 and 19V by pressing it quickly.
• Initiates power flow to the USB charging ports.
• Turn on or off the flashlight by pressing the button for 2 seconds. (Subsequent quick presses will toggle the 3 light modes)
Can the negative cable be attached to a vehicle grounding bolt rather than to the battery's negative post?Yes, the negative (black) clamp does not need to be connected directly to the vehicle battery, a grounding bolt or other solid ground connection will work just as good.
Can I use the RG1000 to jump start by boat, tractor, ATV or other?Yes, you can use the RG1000 to jump start any 12V system with a motor up to 7.0L gas and up to 3.5L Diesel engines.