The Nitecore NL1834 18650 battery is an excellent power source with a very high capacity of 3400 mAh and an output voltage of 3.7 volts. The battery is compatible with most flashlights and other devices powered by 18650 batteries. Nickel-plated stainless steel covers not only increase impact resistance, but also effectively protect against oxidation. Thanks to its efficient energy conduction, the Nitecore NL1834 battery provides a stable and long-lasting power supply, and the high-quality protective film further enhances its reliability. Protections against overcharging, over-discharge and short-circuit, along with a pressure relief valve that activates automatically in the event of a sudden rise in temperature, make the use of this battery safe and reliable. An additional advantage is its excellent performance, supported by two MOS transistors, making it an ideal choice for demanding applications. As many as 500 possible charge cycles confirm the durability of the product, making the Nitecore NL1834 battery not only a power source, but also an investment in long-term performance.