Replacement Battery for Logitech Harmony 1000 1100 1100i 915 C-LR65 C-RL65 Universal Remote Control Part NO 190582-0000 F12440056 K398 L-LU18
Logitech Harmony Companion review: Remote really ties the room together - CNET
How to Replace Battery in Harmony Remote Remote Touch / Ultimate / Elite - YouTube
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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