The Li-Ion battery type 21700 with a capacity of 5300mAh is a high-quality accessory for flashlights offered by the brand Nitecore. This battery is specifically designed for use in flashlights and provides a reliable power source for extended operating times. With a height of 8 cm, a length of 14 cm, and a width of 3 cm, the battery is compact and lightweight, weighing only 0.071 kg. The voltage is 3.6 volts, making it a powerful option for various applications. The battery complies with UN number 3481, indicating adherence to international safety standards. The use of lithium-ion technology ensures high energy density and a long lifespan, making the battery ideal for use in demanding environments. This replacement battery is a practical solution for anyone looking to operate their flashlights efficiently.