Feature Highlights: 1. Built-in 10-Cell Design – Ready to install high-quality INR18650 battery cells (30A discharge recommended) for customizing your machine’s battery capacity. Ideal for DIY, repair, or assembling battery packs. 2. Advanced Protection & Balance – Upgraded circuit board with single-cell balance detection ensures even charging and discharging, preventing over-charge and over-discharge. Built-in memory chip and CPU automatically optimize charging performance. 3. Enhanced Safety & Durability – Protects against incorrect voltage, short circuits, and internal overheating. Made with a sturdy, shock-resistant plastic case for reliable everyday use. 4. Wide Compatibility – Works with popular battery models such as BL1815, BL1830, BL1840, BL1850, BL1860, LXT400, and replacement codes including 194204-5, 194205-3, 194309-1, 194230-4. 5. User-Friendly Design – Features an LED power indicator to check remaining battery level anytime. Offers up to 2.3 times longer run time per charge compared to standard 3.0Ah batteries. Product Details: This professional-grade battery case is built for durability and safety, allowing you to easily repair or create custom battery packs. Its intelligent protection system keeps each cell balanced and secure, while the robust housing stands up to daily use. Compatible with a wide range of 18V tools and devices, it’s a practical solution for extending battery life and performance. Specifications: - Color: Black - Material: High-strength plastic - Package Includes: 1 × BL1860 battery case (battery cells not included) Note: Slight color variations may occur due to lighting or screen differences. Measurements allow a tolerance of +/- 1–3 cm.