New iPhone battery drained by preinstalled Flashlight

The Apple store installed a new battery on my iPhone 5S last week. That did not fix my four to five hour battery life problem. I have followed every article out there on turning off location services, getting rid of Facebook app, etc.
But I found today when I checked "Battery Usage" under Settings: General: Usage: Battery Usage that the culprit is "Flashlight." It states that my iPhone was battery was used 36% of the day by the flashlight preinstalled app that is on the pull-up menu. It is not an app I installed and I don't know how to get rid of it.
FYI - this is not a problem FROM updating to iOS 8. I have updated, but this problem existed prior to the update.
Can anyone help?
Thanks! Ashley.

AshleyLay wrote:
The Apple store installed a new battery on my iPhone 5S last week. That did not fix my four to five hour battery life problem. I have followed every article out there on turning off location services, getting rid of Facebook app, etc.
But I found today when I checked "Battery Usage" under Settings: General: Usage: Battery Usage that the culprit is "Flashlight." It states that my iPhone was battery was used 36% of the day by the flashlight preinstalled app that is on the pull-up menu. It is not an app I installed and I don't know how to get rid of it.
FYI - this is not a problem FROM updating to iOS 8. I have updated, but this problem existed prior to the update.
Can anyone help?
Thanks! Ashley.
Flashlight from IOS do not use battery unless you switch it on.
Try these basic troubleshooting steps:
Restore from backup
Restore as new
http://support.apple.com/kb/HT1414

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after further days of trying finally, solved it for me Yesterday.
turned off notifications when locked, and bingo, wow.
i have not turned off iCloud but location services are also off.
best thing to do I found was keep checking your usage, settings, general, usage, and flip down to bottom, if the standby and usage are similar there is a problem, if there is a big difference then all is ok. Just keep turning things off and on until the difference is very apparent.
something on my phone was keeping the phone alive even when turned off, and I think this was the phone repeatedly trying to update continually.
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HT201401 My iPhone battery drains faster and I connected it to power it shutdown and restarts in several times

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