Apex RC Products 2-6 Cell LED Lipo Battery Voltage Checker Gauge #1660
Works on 2-7 Cell Lipo Batteries With A JST-XH (Most Common Type) Balance Lead
Dimensions: 60mm X 22mm X 3mm Weight: 4.2g
Accuracy To .1V +-2%
SUPER BRIGHT LED's Make It Easy To Read
Reads Individual Cell Voltage - Easy To Tell If A Pack Is Out Of Balance