I would reboot and once it is back up and running, go to Settings>Apps>Running and FC everything that you are not using. Then switched to Cached and FC everything that populated over from running and anything else that you don't need.
When I say need, I understand that you are in the danger zone and w/o power. You don't need Facebook, MediaHub, Music/Video,...Not that those are specific to you, but if you only have one battery left with no power in the future, then I suggest going bare bones for the time beaing.
Sidenote: I was just reading about some things and see that some people in NYC are using Hotels/Gas Stations/ Stores that still have power to charge up the cell phones. Not sure where you are but might be worth looking into. How many times have you gone into that corner store? Do they recognize you? Maybe they could share some power. See where I am going with this?