So I've found myself a little confused. I have an Ultrafire wf-188 charger with 2 voltage settings, 3.2 and 3.7. My 3 volt batteries have a peak of 3.6v. Now does this mean I should be setting the charger to 3.7 volts, or at 3.2V, for a full charge? Furthermore, is setting the charger too high...