Battery Rapidly Drains

I am totally baffled by something. I have a Samsung Note 2 with Sprint and have noticed in the last couple of months the battery drains very quickly and takes hours to charge. I purchased a new battery thinking the old one was shot. However, now that I have a new battery in the phone nothing has changed. The phone is drained quickly and it takes overnight to fully charge it. I've read that it normally takes anywhere between 45 minutes to three hours to fully charge a battery. Does anyone have any ideas what is going on and how to fix this problem? I'm constantly shutting down apps running in the background so I don't think that is it. Even plugged in once the battery is drained the phone will shut down until it is charged more than 10%.

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Clarification Request
DId you start with a factory reset?

That way we start without battery draining ad supported apps. Do not install any apps until your battery gets back to normal.

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Battery Rapidly Draining

Thanks for your reply. Factory reset? All I did was put the new battery in, fully charged it overnight and began using the phone as normal the next day. I did not install any new apps. The only ones on there are a couple of the ones that were on there originally like Facebook.

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Then the news is not good.

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