ALWAYS CHARGE IN A LIPO BAG, seen one blow up at a national, only cost about £5.
I always charge on 4.2v make sure your lipo charger in on the right setting, ie 3.7v in my case, heard people charging at 5.6amps IF the lipo is 5600, 6.5 been 6500, simple, but like I say for me 4.2v.