General battery question

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http://androidforums.com – I want some opioins i noticed as of yesterday my android os woukd stay around 20 25% under light use and its normally at 5-10% heavy use my screen use is usually the high one and thats been staying between 10-20 No new apps or anything have been downloaded And my battery had been dieing really quick could something be keeping it awake that wasnt before Im on 4.1.1 and also noticed my battery drained like 15% throughout the night as i forgot to plug it in and it normally drains between 2-5% (General)