So...I had CM on my phone early on, but stepped away from CM for a while. I loved the ROM, but needed better battery life, due to being out in the field, away from a power source for extended periods. I'd like to come back to CM, but I'm wondering...how is battery life these days? Also...how do these "nightlies" work? If I download the latest one, and install it, do I need to do the previous ones too?