Battery Status There is an LED green light that will turn on when the charger is plugged in. There is also an LED red light that will turn on if the charger is connected incorrectly or if a short circuit is detected. When the battery is connected correctly, the LCD panel will display the battery voltage indicator. The charging symbol will flash as the battery is charging. When the battery is fully charged, the charging symbol will disappear. The battery bar will also flash as the battery is charging, and the bars will increase as the charge of state increases.