If you purchase a new iPhone you get a one year warranty from Apple which should include iPhone battery service. You can also get additional service by purchasing the iPhone Apple Care protection plan which should also include iPhone battery service. The Apple warranty and additional protection plan does not cover your iPhone repairs if you have dropped or damaged the iPhone in some way including dropping it in water or attempting to disassemble it yourself. It also won’t be covered if you have an unauthorized repair place service it for you. https://www.dq-solutions.ch/apple-iphone-xr
One of the best ways to get you phone serviced is to use an online website that specializes in iPhones. When you choose on then use one of their repair plans to get the iPhone to them and they will examine it and let you know what is wrong with it. You will have to authorize the repair and in a day or two you will get it back in the mail. The best thing about this online service is most of them will return the iPhone back to you will all of your data on it whereas Apple won’t. dq-solutions
One thing to consider if you have owned your iPhone for a number of years is whether you want to replace the battery and keep that phone or indulge in a newer model. The newer models certainly have more features so instead of getting iPhone battery service you can order a new iPhone instead.
If you do get a new battery they come with a battery warranty for a period of one to ten years depending on the repair service and or battery you use. Then if you need a replacement battery or battery service on your battery you will need to decide if you are the type of techie who loves to get the newest and the latest in technology and will only keep the new iPhone for a couple of years until a newer and jazzier one comes out. If this is the case you probably don’t need to pay attention to the battery warranty that comes with your replacement battery as you won’t generally need it.
There are many places that provide iPhone service whether for a battery or other issues. If you choose an online repair site they will access your iPhone before they service it and let you know what the problem is and how much it will cost to repair it. Then the choice is yours.
If you want to reduce your battery wear there are a few things you can do. You can turn off push applications to reduce battery wear. You can fetch new data manually instead of having it come automatically which reduces battery wear. If you use auto check for emails you can delete some of the email accounts so it checks fewer accounts. Third party applications that prevent screen dimming draws down the battery so you can use them less. Basically it’s using automatic options less often that save the battery.