Can i replace the battery in my iphone 7?

You can't but Apple will for $50. Make an appointment at an Apple store for help.

~Lyssa

Steven1951 wrote:

Can the battery in my iphone7 Be replaced?

Theoretically yes, but Apple doesn't recommend it and might deny any future service if they notice it. There can also be malfunctions that could occur where Apple won't fix it since it was serviced outside of Apple's repair system.