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 : Health & Household
Kastar 2-Pack Battery Replacement for Logitech Harmony 880 Pro Harmony 880 Remote Harmony 885 Harmony 885 Remote Harmony 890 Harmony 890 Pro Harmony 890 Remote Harmony 895 Harmony 900 Harmony 900 Pro - Walmart.com
Amazon.com: Replacement for Logitech Harmony 900 Battery - Compatible with Logitech Universal Remote R-IG7 Battery (950mAh 3.7V Lithium-Ion) : Electronics
950mAh Li-ion Battery for Logitech Harmony 900, 190304-0004 – SMAVtronics
Replacement Battery for Logitech Harmony One, 900, 720, 850, 880, 885, 900 PRo | eBay
950mAh Li-ion Battery for Logitech Harmony 900, 190304-0004 – SMAVtronics
Cameron Sino 950mAh Battery R-IG7 for Logitech Harmony 785,Harmony 785, Harmony 885,Harmony 890,
Logitech Harmony 1100 Battery Power Block Repair
UltraLast Rechargable Lithium-Ion Replacement Battery for Logitech Harmony 1000 Remote Control URC-LOG1000 - Best Buy
How to take apart the Logitech Harmony 900 Remote - YouTube