This brand new cell phone li-ion battery comes with a free 1 Year Warranty. Budget Batteries guarantees that it will work with your APPLE IPHONE 6s Apple 616-00036 3.8V 1715 mAh LI-POL BATTERY W/ TOOLS , will perform as well or better than the original counterpart, and will be free of defects. Budget Batteries has the widest selection of cell phone batteries, from hard-to-find replacements for older Apple Cell Phones to the newest Apple cell phone models.