Replace your Nintendo Switch Joy-con Controller HAC-006 Battery or Keep an Extra Battery on hand as a backup. This is a High Capacity 520 mAh, Lithium Ion Battery that offers up even more up time than your original battery! Works in your Nintendo Switch Gaming System Joy-con Controller HAC-006. Simple, Easy and Inexpensive! You get a New Battery and Special Tools for Battery Installation, a Helpful Installation Video, AND You also get a full ONE YEAR Money Back Guarantee exclusively when you purchase from us.