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
New Compatible L-LU18 Battery Replacement for Logitech Harmony 1100 1000 915 Remote Control 1250mAh LLU18 190582-0000 - Newegg.com