yeah, i've tried every current setting.
this is what's supposed to happen: you switch on the charger and set the current to the number of amps corresponding to your battery type. you then connect your battery (my 2200mah battery in this case) and the charger will make a single "beep" sound to confirm that the battery is attached and charging. the charger will now "beep" every 5 seconds and the "slow" LED will be flashing, this means that the battery is being trickle charged and that the charger is ready to do a proper charge cycle. at this point you select your charging mode (i.e: discharge, slow charge, fast charge, slow charge) and the charger will confirm your selection with a series of "beeps". that's it, come back a couple of hours later for a fully charged battery.
what's actually happening with the 4200mah battery is: i turn on the charger and set the current to 4.2 amps (eveything is normal at this point). i then connect the battery and nothing happens, the charger does not make a confirmation "beep" and the "slow" LED does not flash...or even turn on. nothing happens. the only noticable change is that once the battery is connected the chager makes a slight buzzing sound coming from the internals and not the speaker.
...so i don't know what to do -____-.
Also: the 4200mah battery is brand new, it has never been charged and contains no charge.