General :: Using Phone As Dedicated Dash Cam?

I have an old beat up Motorola Droid 1 that I've been using as a dedicated dash cam in my car and it's been working great except the battery life isn't great. I keep it in Airplane Mode and it is always connected to the charger but it only charges when the car is running, so when I'm not driving the phone stays on and after a day it dies. Need increasing the battery life? It's rooted and running a custom ROM (Bugless Beast) v0.5 which is Android 2.2) so I'm able to disable any unnecessary apps or services that aren't being used. I'll never use it as anything except a dash cam so even things like GPS are unnecessary. I don't have any apps installed besides the ones used for the dash cam functions.

I keep the phone in a windshield mount and it stays plugged in and I have an app called AutomateIt that detects power whenever I turn on the ignition and it opens up another app called DailyRoads which is set to automatically start recording once opened. I then have AutomateIt set to detect when the power source is shut off and it closes DailyRoads at that point. It works great and all videos are saved to the phone's microSD card. To save space I disabled audio recording so only video is recorded. Finally, I have a tiny wide-angle lens glued over the phone's regular camera lens so that there's a much wider field of view than normal. The more I capture the better.