Replace your Logitech MX Keys Advanced Wireless Illuminated Keyboard Battery also known as MX Keys Keyboard model Y-R0073 or Keep an Extra Battery on hand as a backup. This is a High Capacity 1500 mAh, Lithium Polymer Rechargeable Battery. Works in your Logitech MX Keys Wireless Keyboard. Compatible with Logitech MX Keys YR0073 Keyboard. Simple, Easy and Inexpensive! You get a New Battery, an Instructional Battery Replacement Video, FREE Tools for Battery Installation, AND You also get a full ONE YEAR Money Back Guarantee exclusively when you purchase from us.