This battery tester is a combination low voltage alarm and a battery capacity indicator. Making you aware of the working state of your battery anytime to prevent overcharging or over discharging.
OPERATIONPlug your balance lead into battery as specified on the back of the alarm. The LED display will show cycle through the current cell voltage. The battery monitor alarm will keep buzzing when the voltage is below the set value; Pre-set value is 3.3 V, and you can change and save the voltage settings through the black button between 2 black electric horns.
MATERIALSThe battery indicator comes with a clear LED display, from which you can clearly read the value of battery cell voltages, total voltages, lowest cell voltage, and remaining battery capacity.

STYLECompact size makes this convenient to fit batteries into your tight spaces.