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
Amazon.com: Replacement for Logitech Harmony 900 Battery - Compatible with Logitech Universal Remote R-IG7 Battery (950mAh 3.7V Lithium-Ion) : Electronics
Logitech® Harmony® 900 Universal learning remote with web-based setup at Crutchfield
950mah R-ig7 Loh880 Remote Control Battery And Led Charger For Logitech Harmony One, 900, 720, 850, 880, 885, 890 Pro, H880 - Digital Batteries - AliExpress
Amazon.com: hflexgrad (2-Pack) 3.7V 950mAh Li-ion Rechargeable Battery Replacement for Logitech Harmony One, 720, 850, 880, H880, 880 Pro, 885, 890, 890 Pro, 900, 900 Pro R-IG7, NTA2340 Remote Control Series : Electronics
Amazon.com: Youejoeq (2-Pack) logitech r-ig7 Battery Replacement for logitech Harmony one 900 850 880 885 890 Pro H880,fit Part no R-IG7 190304-0000 f12440023 : Electronics
Amazon.com: Empire Remote Control Battery, Works with Logitech Harmony 900 Remote Control, (Li-Ion, 3.7V, 950 mAh) Ultra High Capacity Battery : Electronics