If your charging at 1C, pretty standard and the safest for new lipo users, charge time is about 45min. to an hour, maybe a little longer. At a 1C charge rate battery capacity doesn't affect charge time. A 1000mah pack charging at 1 amp (1C) is going to take the same amount of time as a 5000mah pack charging at 5 amps (also 1C).

1C = mah/1000 ~ 5000mah / 1000 = 5 amps, 6500mah / 1000 = 6.5 amps