A fix that works for your battery drain with iOS 8.2

After I updated my iPhone 4s to the new iOS 8.2 I found my battery life had become terrible.  I could barely make it through an 8 hour day at work before my phone would die.  It was so bad that I had to get myself a second charger to plug it in during the day.  Even then, if I used the phone at all, it would still lose its charge while plugged in.
Before this update, my phone would easily last through the day and would not need to be plugged in before I went to bed.  Even at midnight when I'd go to rest for the night, my phone was never below 70% and most times it would still be well above 80% but not so with iOS 8.2  So here is a fix I found on another forum somewhere.  I was desperate so I tried it and low and behold, it worked great.
Here goes:
Let your phone die completely until it turns off by itself
Plug it in your charger until it comes back on again (around 6% for mine)
Turn it back off using the top button and the slider on the phone
Leave it plugged in for 2 to 3 hours or until you figure it would have reached 100%
Unplug the phone and turn it on
Now reboot your device (turn it off and back on again)
That's it.  This fixed it for me and for many on the forum where this was posted.  My battery life is back to what it was before my update to iOS 8.2.  I have plenty of battery life left when I get home after work.
Try it and pass it on....it works.

Use the Settings app to determine what apps or processes are using your battery the most. Once you know what is causing the battery drain you can take steps to reduce it.
Settings > General > Usage > Battery Usage
Wait a few seconds for the device to bring up the list of apps with their battery usage.

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