WLT - 10 with very high precision tester of voltage and internal resistance of the cells. This sorting machine has been charaterized with very very stable Wister own designing software with fixed program setting of free-maintenance alson free maintenance for main hardware parts. It has 10channels of 10th  for defective cells; It has also very high working efficiency of 5000 pieces of cell each one hour; what’s more this machine is very easy and high efficient to operate.