Get another Canon charger, because I have never seen a dual one for LP-E6 series. There are for third-party chargers. I have a dual charger from Jupio. It just charges and doesn't reset the exposure count for the battery. 650 mA for one battery, 500 mA each for two batteries. Canon LC-E6 charges one battery with 1200 mA.
I own older Canon dual chargers for my D30 and 1Ds, but they don't charge the batteries at the same time anyway.
