KeepScreen
free
free
The screen backlight on most Android phones uses an awful lot of battery power. Though you can globally tweak the timeout that turns off the backlight, in some circumstances you just don't want it to go out. Maybe you're using an app while driving, or you might have an app that loses data or switches off altogether if the phone happens to lock up its screen while the app is running. For those times, there's KeepScreen. The KeepScreen app lists all of the installed apps on your phone; then, with a tap, you can indicate which ones the screen shouldn't cut out on while they're running.
KeepScreen runs as a service, so it doesn't take up system resources like a fullblown app. You can start or stop the service from within the app, or end it with an app like TasKiller (from the same developer). Optionally, it will pop up an alert message in the notification area when a program has invoked its services. You can also set a 'minimum luminosity' option, which reduces the brightness but keeps the screen lit.
With KeepScreen you can turn down the screen backlight timer to its lowest setting - 30 seconds - and preserve battery life, while retaining full functionality and control over the apps you need to use. Sounds good to us.
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