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
533-000020 930mah Battery For Logitech 720 880 890 900 3.7v R-ig7 Battery - Mobile Phone Batteries - AliExpress
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
Amazon.com: Logitech Li-ion Battery for Harmony Remote ONE 880 890 720 : Electronics