Features: 1. Designed for 5-Series Li-ion Batteries – Specifically made for 18V power tool batteries, compatible with 5S lithium battery packs. 2. Intelligent Protection Chip – Uses a dedicated IC to monitor real-time voltage, charge/discharge current, and temperature for each cell. 3. Comprehensive Safety Protection – Includes overcharge, over-discharge, and short-circuit protection to keep your batteries safe during use. 4. Low Power Consumption – Operating current around 25uA and standby current about 6uA, helping to extend battery life. 5. Easy to Apply – Choosing the right protection board and installing it correctly is key to maintaining battery performance and safety. Product Details: This protection board is designed for 5-series lithium-ion batteries, commonly used in power tools such as drills. It features a special IC that continuously monitors each battery cell’s voltage, current, and temperature. With built-in safeguards against overcharging, over-discharging, and short circuits, it helps prevent damage and prolong battery life. The board is energy-efficient and simple to install when matched correctly with your battery setup. Specifications: - Color: Green - Material: Plastic - Compatibility: 5S Li-ion battery packs (typically 18V) - Protection Functions: Overcharge, over-discharge, short circuit - Low power consumption design Package Includes: 5 x Battery Protection Board Note: Product appearance may vary slightly due to different production batches, but this does not affect performance. Colors may appear different due to lighting and screen settings. Allowable size error: +/- 1–3 cm. Only the listed items are included.