Logitech® Harmony® 900 Universal learning remote with web-based setup at Crutchfield
Amazon.com: Synergy Digital Remote Control Battery, Works with Logitech Harmony 900 Pro Remote Control, (Li-Ion, 3.7V, 950 mAh) Ultra High Capacity Battery : Electronics
950mah R-ig7 Battery With Charger For Logitech Harmony One, 900, 880, 890, K43d, M36b, Avl300, 720, Nta2340, Mcc, Av100, Hr880 - Digital Batteries - AliExpress