6 amps and you will have to play with the peak detect to find 125-135 degrees at peak,this is where mine have performed their best.I use .02 on my GFX.You want to discharge at 30 amps down to .09 per cell and store NO DEAD SHORTING! for these cells.If you store for more than a week put a half charge in them,more than a few weeks put a full charge in them.also need to equalize on a tray before charging, PM recommends the Tekin tray.