Hello, I have some questions before I purchase a digital camera. Here's what I'm looking for: --A camera under $150. --One that is light, small and rugged, it will be used on outdoor jobsites. --Best battery life. In this situation, battery life is very important. Does anyone have any advice when it comes to which batteries should last longer? I really don't understand this stuff, but it seems like lithium ion might be the way to go. Any general advice or advice on battery life would be greatly appreciated.