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
Remote Controls Batteries: Logitech HARMONY ONE ADVANCED Remote Control Battery
Amazon.com: CS Cameron Sino 3.7V 1050mAh Replacement Remote Control Battery for Logitech 915-000198, Harmony Touch, Harmony Ultimate, Harmony Ultimate One, Part No. 533-000083, 533-000084 : Health & Household
How to Replace Battery in Harmony Remote Remote Touch / Ultimate / Elite - YouTube
Harmony Remote Batteries
Logitech Harmony Universal Remote Control OTB Battery - 950mAh
Logitech Harmony One Remote Battery Replacement - YouTube