iPhone 6 battery replacement

And iPhone 6 battery replacement is $49 USD. Go here -> iPhone Battery Replacement - Official Apple Support

The cost of a battery replacement for an iPhone 6 will vary depending on the specific model of your device as well as the current market price for batteries. Apple offers a flat-rate battery replacement service for all eligible devices, which starts at $79.

Alberena wrote:

The cost of a battery replacement for an iPhone 6 will vary depending on the specific model of your device as well as the current market price for batteries. Apple offers a flat-rate battery replacement service for all eligible devices, which starts at $79.

Not really. Direct service from Apple is at a set price for each model, and there may also be shipping added in certain cases, especially if the customer would prefer mail-in service.

The other issue is that Apple Authorized Service Providers are allowed to charge their own prices, and some may even charge for the pre-installation diagnostic that is required, but that Apple doesn't charge for. Many do match Apple' prices.

On top of that, the OP didn't state location, and prices may vary depending on country.

Sorry I just Checked this iPhone Battery Replacement - Official Apple Support Come to know Prices update now it will cost you $49. Please Accept My Apology