Kadafi, I don't recommend charging your batteries at high current. Also what type of battery are you charging? NiCad or NiMH. If Nimh. no need to discharge. If Nicad, I don't also recommend discharging the battery using the above procedure kasi you will shorten the life of your battery by doing so. Using the TLP auto charger with discharge function, the charger will start to charge the battery after discharging the Nicad to about 60% of the batteries capacity. Mas maganda kung mai-charge mo iyong battery mo na di siya umiinit. This is just my opinion and not BAG's Opinion.