You should get your battery replaced before the end of the year! They have been running a special to do that swap for $29. I bought an iPhone 7 used last month

You should get your battery replaced before the end of the year! They have been running a special to do that swap for $29. I bought an iPhone 7 used last month and immediately went to an Apple store to have the battery swapped out. Went from a battery with 86% to 100%. Hopefully the phone itself will last 3-4 years.