For 5S Li-ion batteries, mainly used for electric power tools. Uses a special IC designed for 5S lithium batteries to monitor real-time voltage, charge and discharge current, and ambient temperature of each cell. Provides stable charging and discharging protection functions, including overcharge protection, over-discharge protection, and short circuit protection. Low power consumption with a working current of approximately 25uA and quiescent current of about 6uA. Selecting the correct protection board and applying it properly is essential for battery safety and performance. Note: Product appearance may vary due to different production batches, but this does not affect functionality. Color: Green Material: Plastic Package Contents: 2 x Battery Protection Board Only the items listed are included; other accessories are not part of the package. Note: Lighting effects and display settings may cause slight color differences between the image and the actual item. Measurement error allowance is +/- 1-3 cm.