Sonos CR200 Wireless control of your Sonos Multi-Room Music System (Discontinued by Manufacturer)
1850mAh Li-ion Battery for Sonos Controller CR200 Remote Control - Walmart.com
Amazon.com : Battery for Sonos 200, CB200, CB200WR1, Controller 200, Controller CB200, CR200 : Digital Camera Batteries : Electronics
Empire Remote Control Battery, Works with Sonos Controller CR200 Remote Control, (Li-Ion, 3.7V, 1800 mAh) Ultra High Capacity, Compatible with Sonos 1000000118 Battery - Walmart.com