The Harmony 700 is equipped with 2 AA rechargeable Nickel-metal hydride (NiMH) batteries. Battery life between charging can vary significantly depending on how much you use your Harmony remote. An average full charge should last 30 days.
You can extend the battery life of your remote by lowering the backlight timer. For additional information on lowering the backlight timer, please refer to article 360023217454 - How do I adjust the backlight (Glow) timing on my Harmony Remote.