Amazon.com: Empire Remote Control Battery, Works with Logitech HARMONY TOUCH Remote Control, (li-ion, 3.7V, 1100 mAh) Ultra High Capacity Battery : Health & Household
How to make sense of Logitech's universal remote lineup | Engadget
Best Buy: Logitech Harmony Ultimate One 15-Device Universal Remote Black 915-000224
Logitech Harmony Companion review: Remote really ties the room together - CNET
Logitech Harmony Pro - Universal Remote Control & Hub