How much does Apple charge to replace a battery in an iPhone 6?

Here is the pricing for iPhone battery replacements:

iPhone Battery & Power - Official Apple Support

Basically around $50 bucks.

Best,

GB

The OP doesn't seem to think that there is an issue with the need to replace the battery. All they wanted to know was the pricing....

GB

Quote: "....& need to replace the battery."

Asking for a price having in mind "nice to have talked about" doesn't make any sense.

First take it back to where you bought it and complain. Real refurbishing means to replace the battery first. When they sell the phone and advertise it as "refurbished" you shouldt get a new battery.