Logitech Harmony One Remote Battery Replacement - YouTube
Harmony Remote Batteries
Amazon.com: Synergy Digital Remote Control Battery,Compatible with Logitech Harmony Touch Remote Control, (li-ion, 3.7V, 1100 mAh) Ultra High Capacity Battery : Health & Household
Amazon.com: Replacement Battery for Harmony 950, 915-000260, Elite, 915-000257, fits Part Number 533-000128, 623158, Remote Control Cameron Sino CS-LOH950RC 3.7V Li-Polymer 1300mAh/4.81Wh : Electronics
533-000084 Battery for Logitech Harmony Ultimate, Harmony Touch Remote Control 700175767332 | eBay