The Fenix 18650 Flat-Top Li special battery is a powerful lithium-ion battery specifically designed for use in flashlights. With a capacity of 3400 mAh and a voltage of 3.6 volts, this battery provides a reliable power source for various applications. The 18650 size makes it a versatile accessory that can be used in many modern flashlights. The battery is characterized by its high energy density and longevity, making it ideal for frequent use. With a height of 69.5 mm, it fits easily into most flashlight models. The UN number 3481 indicates the safety standards adhered to during the manufacturing of this battery. The Fenix special battery is rechargeable and offers an environmentally friendly alternative to conventional batteries, as it can be used multiple times. It is an excellent choice for anyone looking for a reliable and powerful energy source for their flashlights.