Replacement battery for the iPhone 6. Exact specs as the original battery for your Apple iPhone 6, has been tested thoroughly and surpassed all battery regulations, and comes with everything you need to install it including the replacement glue strips to make sure it is held down securely (which other replacement batteries don’t come with usually). Guaranteed to work flawlessly and is easy to install. Even comes with a video with exact instructions on how to replace the battery.
UPDATE 4/30/2020: Temporarily out of stock, more coming in soon. In the meantime, I’ve linked to one on Amazon that is a good replacement.