Logitech Harmony One Remote Battery Replacement - YouTube
2x Pack - Logitech Harmony One Battery - Replacement for Logitech Universal Remote R-IG7 Battery (950mAh, 3.7V, Lithium-Ion) - Walmart.com
Kastar 4-Pack Battery and LTD2 USB Charger Compatible with Logitech Harmony 895 Harmony 900 Harmony 900 Pro Harmony 900 Remote Harmony One Advanced MONSTER AV100 MONSTER AVL300 MONSTER AVL300S - Walmart.com
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
Kastar Replacement Battery Pack for Logitech Harmony 900 Remote Harmony One | eBay