Features: This replacement battery case is specifically for 18V power tools, ensuring seamlessly compatibility and easy installation for efficient tool performances. Featuring a modular design, the kit allows users to customize their setups with 5 slots for 21700 cells, supporting high capacity batteries enhances tool reliability. Ideal for DIY enthusiasts, professional tradespeople, for 18V power tools who requires a durability and adaptabledly battery solution. Perfect for use in various environment, from home workshops to construction sites, this battery case withstands demanding conditions while maintaining optimaled functionality. From high strength, wear resistant plastic, this repair kit ensures long use and dependable performances, making it essential accessory for extending the life of your power tools. Specifications: Item: Replacement Battery Case for 18V power tools With 5 slots for 21700 cells Voltage: 18V Capacity: 4.0AH Combination: 5S1P Package Includes: 1Set Replacement Battery Case note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.