The icons on the screen are described below: 1. Screen About the input or output state IN When this icon is ON, it means V4500 Plus is being charged. OUT When this icon is ON, it means V4500 Plus is discharging. When this icon is ON, it means V4500 Plus is being charged or discharging fast at the rate of 18W or above. About exceptions When this icon is ON, it means V4500 Plus is overheated. (V4500 Plus will return to normal temperature after it stops running.) When this icon is ON, it means short circuit or reverse polarity has occurred. When this icon is ON, it means an exception beyond the above two types has occurred.
About battery charge The four levels from bottom to top represent 25%, 50%, 75% and 100% of charge respectively. About working modes Jump Start mode BOOST mode Battery Test mode 7