.2 is acceptable. Charging at only .1 amp for final balance is normal too especially if there is a measurable imbalance. I've had some of my 5000 mah 6s x 2 heli batteries take upwards of 4 hours to completly balance charge after pushing them very hard (<10% remaining) Let it finish then discharge and charge again. I bet it charges much faster next time. Plus you can check the discharge capacity.