The C9000 cycles through information about each cell in the unit - mAh, mA, time, voltage (and cycle if you are doing a multi-cycle charge). If you have more than one cell in the charger, the SLOT button lets you move the display to different slots without having to wait for they display cycle to complete. For example, if the C9000 is highlighting slot 1 and you want to check on the cell in slot 4, just press SLOT three times to move to slot 4.I found that there are 4 buttons in MH-C9000. The up and down buttons is obvious but what is the usage of the "SLOT" button?
Thanks!