NEW Logitech Harmony Remote Replacement BATTERY 915 1000 1100i L-LU18 1300 mAh | eBay
Kastar 2-Pack Battery and AC Wall Charger Replacement for Logitech Remote R-IG7 RIG7 R1G7 Harmony 895 Harmony 900 Harmony 900 Pro Harmony 900 Remote MONSTER AV100 MONSTER AVL300 MONSTER AVL300S - Walmart.com
Harmony Remote Batteries
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
How to Change battery in Harmony Companion - YouTube