Samsung Galaxy J3 Battery Life

I ordered a Samsung Galaxy J3 about a month ago and my Republic Wireless experience is MUCH improved from my old Moto G phone. I was so impressed with the battery life of this phone until 2 days ago. It seems that overnight that battery performance has declined significantly. Even without apps open, suddenly, my phone battery decreases 1% around every 5 minutes even when not in use. I’ve not changed anything. This seems odd to me. Any ideas?

Go to Settings, Battery and tap on Battery Usage. Scroll down to a list of the features that are consuming the battery. You might find the answer there:

Mine is weird because it has had a USB connection to SideSync all day.

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