I've heard a lot of good things about these Lithium batteries and I just wanted to get everyone's opinion on them. I already have a couple lead acid batteries that I've made do with for smaller projects but I'm thinking about going for something bigger. The battery I'm thinking about getting is a 7.7 pound 12 volt 20 amp hour lithium ion deep cycle battery Smart Battery® 12V 20AH Lithium Ion Battery I plan on using it for charging my laptop, phone, running a fan and maybe even a small cooler that I'm hoping I can make ice with. I was also hoping to try connecting a HDTV projector to it as well but I think that might be too much for the battery. My methods for charging this battery besides using an outlet will be with solar panels and a 5 gallon bucket hydroelectric generator (yes I'm building one) which uses a Toyota alternator. Any tips, info or suggestions would be appreciated.