At Horizon we got a video FCIF in which Carlos said "Captains, you are the ranking member of your entire crew and have an important leadership role. This level of authority dictates that you will be held to a higher level of accountability for the choices you make while on a layover... Unwanted or inappropriate sexual advances will not be tolerated."
You can, if you know how. It sounds like you don't, so have it done at an Apple authorized service provider. It takes all of an hour or so and costs $29. You might be able to get it done cheaper somewhere else, but it will probably use a cheap, low-quality battery. I'm just not a fan of having one of those close to any part of my body.
Apple, Google, Samsung, you name it. They're all engineered to fail and we're all nitwits for ever believing otherwise. They want you to stick with the two year upgrade cycle, even though it's not as necessary as it was, say five to seven years ago. A massive class action lawsuit would straighten them out, but it'll probably never happen.
I had a new charging port and battery installed at a place in downtown Issaquah. Nice that it was walking distance from Rogue River brewery. It was expensive but I highly recommend it.