Designed for LiPo, LiHv, LiFe, LiIon batteries, highly effectively manage your different batteries with just our BC-8S Battery Checker. Built-in four bright LED lights and two 85dB buzzer, with sound and light tracking signal, you will never lose contact with your UAV. 3 kinds of working mode, easy to switch as you wish. Voltage recording function Histogram can tell you the voltage change during usage of battery. The upper part tells you the lowest voltage recorded during usage. The lower part shows you current voltage. For on-board measurement, it's recommended to use this mode, after your flight by checking histogram, it can easily tell how well is your battery. Suitable for batteries with JST XH 2.54 balance port, connect the balance port start from "BAT-"