iPhone 6: Testing my battery for failure?

My battery charge seems to drop and drop, even with WiFi and Bluetooth off, and emails set to update Manually.

Is there an app I can run which will test the battery?

Thanks
newbiewebSr. Software EngineerAsked:
Who is Participating?
 
Kyle SantosCustomer RelationsCommented:
Plug device into computer with iTunes.
Make a backup. (I recommend 'This computer' because iCloud doesn't save allthethings)
Then restore iPhone.
When the restore is finished, restore Backup.
https://support.apple.com/en-us/HT204184
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darbid73Commented:
Is the battery status a little erratic for example maybe when you plug it in it starts charging and charges really quickly.  Then you unplug it and the battery life goes down again.

This happened to me and I had to just reinstall the current iOS.  It fixed it fully.
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newbiewebSr. Software EngineerAuthor Commented:
Yes, it charges fast, then discharges fast.

How do I install the current OS? I just ran an update. Do you mean wipe the phone, then reinstall the OS?

What steps are required?
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newbiewebSr. Software EngineerAuthor Commented:
I plugged it into my MacBook and it did reinstall a new version of the OS, even though I did that earlier today.


I was a bit confused with your directions, actually.

I assume if it reinstalled the OS, the Backup and the Restore took place under the covers. No?
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Kyle SantosCustomer RelationsCommented:
Honestly, backing up the iPhone is just my best practice because it makes a copy of my information to use in case my device is ever replaced, lost, or damaged.  If you didn't want anything saved from your iPhone, then just wiping and installing a new iOS is all you need to do.  

Let us know how wiping the device did for your battery testing.
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newbiewebSr. Software EngineerAuthor Commented:
it seems okay thus far
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