Amazon.com: Synergy Digital Remote Control Battery, Compatible with Logitech Harmony One Remote Control, (Li-Ion, 3.7V, 950 mAh) Ultra High Capacity Battery : Electronics
1000mAh High Capacity Replacement R-IG7 NTA2340 Battery for Logitech Harmony 720 785 850 880 885 890 900 & One Advanced Remote Controls 190304-2000 F12440023 - Newegg.com
Battery for Harmony One 720 780 785 880 885 890 900 R-IG7 | eBay
Cameron Sino 950mAh Battery R-IG7 for Logitech Harmony 785,Harmony 785, Harmony 885,Harmony 890,Harmony 720,Harmony 900, 780, 895 - AliExpress
CS Remote Control Battery for Logitech Harmony One 720 Pro 880 Pro 890 Pro 900 Remote
950mAh Li-ion Battery for LOGITECH Harmony 785 – SMAVtronics
Cameronsino Battery For Logitech Harmony 785 880 885 890 720 720 900 Mx-890 One Fits Logitech 1903040000 Remote Control Battery - Digital Batteries - AliExpress
Kastar 1-Pack Battery and LTD2 USB Charger Compatible with Logitech Harmony 880 Harmony 880 Pro Harmony 880 Remote Harmony 885 Harmony 885 Remote Harmony 890 Harmony 890 Pro Harmony 890 Remote - Walmart.com