FSRD-100 10-100V Battery - Lithium Battery Voltage Indicator

FSRD-100 10-100V Battery - Lithium Battery Voltage Indicator. This indicator shows the voltage, percentage battery capacity and charging time of the battery and lithium batteries. .It shows the status of the battery from red to green thanks to the 10 LED bars on it. There is a button on the back, the mode can be changed with the button.