There are plenty of ways to improve the battery performance... You could just use the search on top;
But I've read an very interesting post on reddit which I don't really want to try, just for your reference :P
Swapped my nexus 5 battery for the battery from the LG G2 for a 30% increase in...
Applying on the screen protect should not affect the touch function of your phone...
There might cause more damage to your already broken phone during the installation process.
Though the Gorilla Glass 3 using in this phone is claimed to be far more durable than before, it still can not survive some kind strong impact.
So using a protective case is a good idea if you want to save your phone in some certain circumstances.
Re: galaxy S5 Active screen glass replacement
Seems hard to find the replacement glass for this model...
Why not try to contact your local repair shop to see if they have?
Re: What if my lg g3 screen is crack but still works but wont respawn to touch
The screen of LG G3 is a LCD screen which means it can be divided into 3 parts: glass, digitizer and lcd screen. It seems you've cracked the glass and the digitizer. Replace the whole screen assembly is a better...
Re: screen won't turn off after glass repair
Seems something wrong with your display. Did you bend the flex cable during the repair process? The most commen reason why your screen is black is because you've damaged the flex cable unconciously during the process.