User manual Logitech Harmony 900 (English - 59 pages)
Amazon.com: Replacement for Logitech Harmony 900 Battery - Compatible with Logitech Universal Remote R-IG7 Battery (950mAh 3.7V Lithium-Ion) : Electronics
R-IG7 Battery for Logitech Harmony 900 880 890 720 885 Pro Universal Remote 190304-2000 F12440023 - Walmart.com
Swollen Battery in your Logitech Harmony 900?
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