Not sure why you want to do a fast cycle. The best way to cycle a battery is to discharge at C/5 (400mah or .4A) and to charge at C/10 (230 mah or .3A). This will give you the most accuracy if you want to determine how much charge the battery is actually holding. If you discharge faster or slower your charger will tell you it's replacing more or less charge, leading to an inaccurate conclusion.