I flew today and landed with 32% left in my battery.  I plan to fly tomorrow so I charged it back tonight.  It took over 90 minutes to fully charge.  Is that typical?  I thought I read somewhere (here?) that charge time was only about 40 minutes.  
How long does it take you to charge your batteries?

Also... Does it seem unsafe to anyone else that there are two exposed male prongs on the charger and the manual says to plug into the wall first and then plug in the battery?   I'm not sure I'm comfortable with those prongs being live when I plug into the battery.  What if I touch them?  Is there a shock hazard?

-TSP181

90 minutes seems OK to me.
No shock hazard, it's only around 12 volts DC

I timed it one time, and one of the batteries took close to two hours.  It seems like 90 minutes is normal.

I'm going to need more batteries....