Welcome to Android Central! Unless that wooden floor was carpeted, it's still a hard surface, so some damage could have occurred. What phone do you have?
First off, it sounds like the screen may have been damaged a bit, if you're seeing some dead pixels. Watch that closely--it can start to spread until much of the screen is unusable. If that's the case, you'll have to replace the screen.
For the battery, take it out, place it on a flat surface, and try to spin it. If it spins freely, it's bulging in the middle, which means it's failing. In any case, try a new battery, because if the new battery doesn't drain like that, you know your current battery is having a problem.
08-03-2014 01:35 PM