Harmony One Battery Repair : 6 Steps - Instructables
Harmony Remote Batteries
Logitech Harmony One Remote Battery Replacement - YouTube
Logitech Harmony One Advanced Remote Control Battery Li-Ion 3.7V (950 mAh) Battery - Replacement For R-IG7 and Monster MCC - Battery World
Remote Control Battery R-ig7,f12440023,k43d,m36b,m41b,190304-200 For Logitech Harmony One, 720,780,785,880, 885,890,895,900, Pro - Digital Batteries - AliExpress
Amazon.com: Replacement for Logitech Harmony One Battery - Fully Compatible with F12440023, Kardon TC30, 190304200, 190304-200, 1903042001 - (950mAh Li-ion) : Electronics