Samsung Note 4 Smartphone for Verizon

I currently own a Note 4 that was purchased new and my battery life was fading, so I replaced with a new battery. As these are likely the same age, wondering if there are new batteries in these?

Who were these phones refurbished by, Samsung, or some third party?

3rd party.

If they were done by Samsung, we’d list it as Factory Reconditioned.

The batteries are tested and replaced if necessary.