Voltage Horizon is a small app I made that puts a little tiny 2 pixel wide battery meter at the top of your screen. I'm surprised I'm the first person to come up with this idea! The % of the screen the bar takes up represents the amount of battery left. If the bar is the size of half your screen, then you have 50% battery left. at 50% the bar turns yellow, and at 35% it turns red.
In order for Voltage Horizon to start every time Windows starts, you will need to put Voltage Horizon.exe in Start Menu> All Programs> Startup.
Download Voltage Horizon