Replace your MX Keys Keyboard Battery with a NewPower99 Battery Replacement Kit that includes a 1500 mAh, High Capacity Lithium Polymer Battery. Your Kit comes with Special Installation Tools and Video Instructions to help guide you through replacing the Battery in your MX Keys Keyboard. You also get a Full One Year Money Back Guarantee on the new battery. Give New Life to Your Logitech MX Keys Keyboard with this Battery Replacement Kit.