Charge time will depend on how you setup the charging cycle. You'll need to define the voltage of the battery and amperage that you want to charge at. Most people charge at a rate of 20-50% the battery's mAh rating - i.e., for your 1700 mAh battery, the voltage would be set to 9.6 V, and charge rate would be between 350-850 mAh (or more likely 300-800 mAh as most chargers won't set in 50 mAh increments). The total charge time (in hours) would then be your battery's mAh divided by your charging rate.
More information on batteries and charging methods can be had at Battery University (http://batteryuniversity.com/