With all these storms, typhoons, and flash floods, one of the most important things you should have is a mobile phone as it is the only way you can communicate with the outside world while you're stuck in a bad situation.
However, there will come a time that you will be unable to charge your gadget and then you'll feel really alone. That's what happened to me a couple of weeks ago when I got stranded on top of a building for a few days. It's a good idea then to invest on equipment that will help you charge your mobile phone or other electronic equipment in the house. Here is just one of them.