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Hey there!
First of all, take out the blink feed, set another wallpaper the darker it is the better it saves your battery, as bright colors demand large aboumt of power.
Remove unwanted app which are running.
Adjust the brightness lower the better.
If that doesn't give you enough battery life then buy mophie juice for HTC one, my friend got one for 69 usd. As it will give you more than a day power.
Goodluck.
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