Discover the power of convenience with the LogicMark 35917 Rechargeable Li-Ion Special Pendant Batteries, available in a 2-pack. These batteries feature Lithium Ion (Li-Ion) chemistry, ensuring reliable and efficient performance for your multipurpose needs. With a voltage of 3.6V DC, they provide a safe and effective power source. Perfectly fitting your device, these batteries are an ideal solution for replacing batteries that are nearing the end of their life. Don't let a failing battery slow you down—upgrade today and keep your devices running smoothly!