Features: Ensuring the safety and stability of the battery during charging and discharging. It is suitable for users who need to use electronic equipment for a long time, effectively solving the problems of battery overcharge and overdischarge, and prolonging battery life. The plastic casing is not only light, but also has good heat dissipation to prevent the battery from overheating when working under high load. This design can provide temperature control for your equipment whether it is used outdoors or indoors. Meet the power requirements of different devices. It is suitable for a variety of consumer electronic products, such as drones and power tools, and provides users with flexible power management solution. It can be installed quickly without complicated tools, saving users time and energy. Especially suitable for enthusiasts and professional maintenance personnel to improve work efficiency. Built-in multiple safety protective mechanisms, including short-circuit protective and over-current protective, ensuring the safety during use. Suitable for daily use at home, ensuring the safety of family and equipment. Specifications: Component:Metal Type:3S 12.6V/4S 14.6V Size:Approx.87x35x11mm/3.43x0.43x1.38inch Work power consumption:<40UA Sleep over-discharge power consumption:<10UA Operating temperature:-30/+80℃ Package Includes: 1Pc Protective Board note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item