Compatible Li-Ion Battery for Logitech Harmony Remote 890 Never run out of battery power with this Logitech Harmony Remote 890 li-ion compatible battery. This replacement battery has an integrated microchip that prevents overcharging and lengthens battery life. Best replacement for the original battery. Great bargain with excellent quality guaranteed. Color: White. Voltage: 3.7V. Type: Generic / Aftermarket. Accessory ONLY, remote not included. Compatible With Logitech: Harmony 720 / 880 / 885 / 890 / 900.