Introducing the UltraFire 21700 5000mAh 3.7V rechargeable lithium battery with protection board. This battery is designed and manufactured by the trusted brand UltraFire, ensuring high quality and reliability. With a capacity of 5000mAh and a standard voltage of 3.7V, this battery is perfect for powering a variety of devices.

The UltraFire 21700 battery is rechargeable for over 1000 cycles, making it a long-lasting and cost-effective choice. It weighs approximately 75g and has a size of 73mm*21±0.2mm (with PCB). This battery is made with Li-ion chemistry, providing high energy density and an extra long life for all your battery powered devices.

Certified by CE, FCC, MSDS, and UN38.8, this battery is safe and environmentally friendly. It also comes with the option of a protection circuit board, which helps to avoid over-charging, over-recharging, and over-current. This makes it a reliable and secure choice for daily use.

The UltraFire 21700 battery is a great solution for providing continuous power to your devices. Its high capacity and long-lasting performance make it ideal for various applications. Upgrade your battery game with the UltraFire 21700 5000mAh 3.7V rechargeable lithium battery with protection board (2PCS).