Hacked

[Sprint_Juan]

I was asking if the fast draining battery issue started happening after an Update? 

Other possible cause for these issues are Rogue apps and Misconfigured settings. Apps that aren’t up-to-date are usually the ones that are misbehaving especially when a new iOS version is installed. Some apps tend to keep running in the background, which eventually causing the processor to keep working. That therefore leads to constant power consumption.

The way you configure your iPhone settings particularly on the iPhone display, notifications, location services, wireless services and other battery-consuming iOS features are also among the attributes that could yield to rapid battery draining on your iPhone. And because of this, it is but recommended to optimize and adjust these settings in a way that reduces power consumption.

Try a Soft Reset:

Press and hold the Power button (located on the top right edge) until "slide to power off" appears then release.
 If the phone is off or not responding, refer to soft reset for unresponsive iPhone.

1. Slide the Power switch right.
    Allow several seconds for the device to power off.
2. With the device powered off, press and hold the Power button until the Apple logo appears then release.

[Sprint_Juan]

Other options are to Delete/remove bad apps from your iPhone.

1. Tap Settings from your Home screen.
2. Tap Battery.
3. Go to the Battery Usage section.
4. Then tap on Last 24 Hours tab or Last 10 Days tab to view more details about battery usage by individual apps at certain period of time.

If you find any app that’s using much power than usual, uninstall or delete that app. To delete or uninstall app from your iPhone