Re: Screen on time monitoring app?
If you are leaving the computer on 24/7 and it has a internal battery (laptop), the battery will begin to lose it's charge over time. Battery wasn't designed to always hold a full charge, so you will see some degradation. Me personally I charge my laptop when it's low and use it on battery power when I am casually surfing, emailing etc. I plug it in for games an prolonged sessions. As mentioned above there are lot's of apps in the app store that will help you monitor your battery health.
Originally Posted by Chetan Takyar
FYI - Not good for your screen to leave it always on, again it has a life cycle as well. Screen costs more to replace than the battery.