My battery needs replacement no Apple store nearby where is an authorized service provider

Click on this link to find your nearest Apple Authorized Service Provider (AASP) or Apple Authorized Distributor (AAD) --> Find Locations or see if you can find any service locations in Find Locations Some places with limited support may be included in the "other" link at the bottom of a region selection.

Or go to this web site for information about how to request battery service for your iPhone: iPhone Battery Repair & Replacement - Apple Support

For cost and availability, enter your model information in the "Get an estimate" box at the bottom. (It is best that you do this since sometimes contributors here forget this is an international forum and not everybody asking questions lives in the contributor’s country.)

For instructions on how to get your iPhone, iPad, or iPod touch ready for service click here --> Get your iPhone, iPad, or iPod touch ready for service - Apple Support

Click Get Hardware Help at Genius Bar Reservation and Apple Support Options - Apple or start by selecting a authorized repair location or Apple Store from Find Locations

In the US, most Best Buy stores are authorized service providers.

Now for the bad news… Though the iPhone 7 is still technically supported, it’s really not cost effective to replace the battery in it. That will cost you more than the device is worth. It’s probably time to consider a new phone.