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
Not so great: Outside control, Multi-touch, and Battery Life - The Logitech Harmony Elite Experience: Ultimate Control
Review: Logitech Harmony Touch Universal Remote Control | iLounge
Amazon.com: Replacement Battery for LOGITECH Harmony Ultimate Harmony Touch 915-000198 1209 533-000083 533-000084 Harmony Ultimate One : Health & Household