5LEDdisplayforbatteryenergylevelfrom20%to100% 0%LEDFlashing for singelcellvoltage 3V(mustrechargebattery) 1LED=20% for singelcellvoltage:3.0-3.3V(batteryneedrecharging) 2LED=40% for singelcellvoltage:3.3-3.5V 3LED=60% for singelcellvoltage:3.5-3.8V 4LED=80% forsingelcellvoltage:3.8-4.0V 5LED=100% forsingelcellvoltage:4.0-4.2V (batteryisfull)