The Xtar 21700 4900mAh battery with protection is a powerful and rechargeable lithium battery suitable for a variety of applications. With a capacity of 4900 milliamperes, this battery provides a reliable energy source that ensures a long runtime. The 21700 form factor makes it compatible with many devices that require high energy density. The battery is equipped with a protection mechanism that prevents overcharging, over-discharging, and short circuits, enhancing the safety and longevity of the product. Manufactured in China, this battery is not designed for medical applications but is aimed at users seeking a robust and efficient energy source for their electronic devices. The rechargeable functionality allows for sustainable use, making the battery an environmentally friendly alternative to disposable batteries. The 21700 4900mAh battery is therefore an excellent choice for those who value performance and safety.