Ever since I cracked the screen Saturday on my 9700, the battery life has gotten awful. I can't make a whole day now on a charge, where as I was getting up to 2 days before. Is this due to the cracked screen ?

maybe you injured more than just the screen.

When you dropped the phone it might have affected the postion of the battery as well...it better you get it insoected by a professional who has experience repairing Blackberry device....you might try out Blackberry Bold 9700 Repair