Logitech Harmony One Battery - Replacement for Logitech Universal Remote R-IG7 Battery (950mAh, 3.7V, Lithium-Ion) - Walmart.com
Harmony Remote Batteries
Synergy Digital Remote Control Battery, Compatible with Logitech 915-000198, Harmony Touch, Harmony Ultimate, Harmony Ultimate One Remote Control Battery (3.7, Li-ion, 1050mAh) - Walmart.com
VINTRONS Replacement Remote Control Battery for Logitech Harmony Ultimate/Logitech Harmony Touch 533-000084/915-000198