RipaFire&reg; RC CellMeter-7 Digital Battery Capacity Checker Controller Tester for LiPo/LiFe/ Li-ion/NiMH/Nicd Use for LiPo LiFe Li-ion NiMH Nicd battery. The Cellmeter-7 is a simple, fast and brilliant way to check battery voltage and most importantly. Precise Measurement of 1-7 cell voltages. Monitors the voltage of individual cells. Display cell with highest and lowest voltage. Display difference between highest lowest cells. High quality and lightweight with excellent performance