Android OS draining battery - Nexus 7 (2013) Q&A

The Android OS is takes up 63% of my battery usage while the screen on takes up 4%. I couldn't figure out what exactly is draining my battery. Please help me find out what is the problem. Thanks.
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Related

[Q] Did my battery just fail?

This is a screenshot of a normal nightly charge on the same charger. Note the slope of the line change and the 26 min for full charge. I was sleeping and not doing anything during the charge rate change.
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*backup* wakelock

I have got a battery drain issue and when using betterbatterystats to check the issue it was like this
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"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
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}
This state is for the last 6 hours
So what can I do in this case?
Sent from my Nexus 7 using xda app-developers app

Process in battery stats I've never seen.

Either I've never ever noticed this or its a new process but I want to know what it is as it conaumed a portion of my battery. On a side note holy wakelocks Batman.
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"lightbox_error": "The requested content cannot be loaded. Please try again later.",
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"lightbox_full_screen": "Full screen",
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"lightbox_new_window": "New window",
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Is this abnormally high android system drain?

Hello, I was gaming for about 2 hours straight, have about 2.5 hours of SoT. Is this the famous "android drain"?
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"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}

Battery percentage freezes.

Anyone had the same bug?
I'm on open beta 24 and my battery percentage freezes all the time.
Looks like this:
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"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
Tried wiping cache?
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